Crystalline forms of (2R,5S,13AR)-8-hydroxy-7,9,-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide

ABSTRACT

The present invention relates to crystalline forms and co-crystals of (2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide, the pharmaceutical formulations, and the therapeutic uses thereof. The present invention also relates to novel crystalline forms of sodium (2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate Form I.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit under 35 U.S.C.119(e) of U.S. Provisional Patent Application Ser. Nos. 62/015,238,filed Jun. 20, 2014 and 62/017,183, filed Jun. 25, 2014, the disclosuresof which are hereby incorporated by reference in their entirety.

FIELD

The present invention relates to novel crystalline forms and co-crystalsof(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,the pharmaceutical formulations, and the therapeutic uses thereof.

BACKGROUND

Human immunodeficiency virus infection and related diseases are a majorpublic health problem worldwide. Human immunodeficiency virus type 1(HIV-1) encodes three enzymes which are required for viral replication:reverse transcriptase, protease, and integrase. Although drugs targetingreverse transcriptase and protease are in wide use and have showneffectiveness, particularly when employed in combination, toxicity anddevelopment of resistant strains have limited their usefulness (Palella,et al. N. Engl. J Med. (1998) 338:853-860; Richman, D. D. Nature (2001)410:995-1001).

A goal of antiretroviral therapy is to achieve viral suppression in theHIV infected patient. Treatment guidelines published by the UnitedStates Department of Health and Human Services provide that achievementof viral suppression requires the use of combination therapies, i.e.,several drugs from at least two or more drug classes. In addition,decisions regarding the treatment of HIV infected patients arecomplicated when the patient requires treatment for other medicalconditions. Because the standard of care requires the use of multipledifferent drugs to suppress HIV, as well as to treat other conditionsthe patient may be experiencing, the potential for drug interaction is acriterion for selection of a drug regimen. As such, there is a need forantiretroviral therapies having a decreased potential for druginteractions.

As discussed in co-pending application U.S. Ser. No. 14/133,855, filedDec. 19, 2013 entitled “POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS AND THEIRPHARMACEUTICAL USE”,(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidedemonstrates anti-viral activity. As discussed in co-pending applicationPCT Serial No. US2013/076367, filed Dec. 19, 2013 entitled“POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS AND THEIR PHARMACEUTICAL USE”,(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidedemonstrates anti-viral activity.

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,(Formula I), has the following structure:

It is desired to have physically stable forms of the compound that aresuitable for the therapeutic use and the manufacturing process.

SUMMARY

In one aspect, the present invention is directed to novel forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In one embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I.

In a further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm II.

In a still further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III.

In a yet further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm IV.

In a yet further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm V.

In a yet further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm VI.

In a yet further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm VII.

In a yet further embodiment, the present invention is directed to(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm VIII.

In a certain embodiment, the present invention is directed to a fumaricacid co-crystal of (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In another embodiment, the present invention is directed to a citricacid co-crystal of (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In yet another embodiment, the present invention is directed to anoxalic acid co-crystal of (2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In particular embodiments, the present invention is directed tocrystalline forms and co-crystals of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1%2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In a further aspect, the present invention is directed to novel forms ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,having the following structure (Formula II):

In a still further embodiment, the present invention is directed tosodium (2R,5 S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1%2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

In yet a further aspect, the present invention is directed to novelforms of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,having the following structure (Formula III):

In yet another embodiment, the present invention is directed topotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

In yet another embodiment, the present invention is directed topotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm II.

In yet another embodiment, the present invention is directed topotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm III.

In a still other embodiment, the present invention is directed tohydrated potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

In still another embodiment, the present invention is directed tomethods of treating or prophylactically preventing an HIV infection byadministering a compound (e.g. Formulas (I), (II), and/or (III))provided herein.

In still another embodiment, the present invention is directed to acompound (e.g. Formulas (I), (II), and/or (III)) provided herein for usein methods of treating or prophylactically preventing an HIV infection.

In still another embodiment, the present invention is directed to theuse of a compound (e.g. Formulas (I), (II), and/or (III)) providedherein in the manufacture of a medicament for treating orprophylactically preventing HIV infection.

DESCRIPTION OF THE FIGURES

FIG. 1: XRPD pattern for (2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I.

FIG. 2: XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm II.

FIG. 3: XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III.

FIG. 4: XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm IV.

FIG. 5: XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

FIG. 6: Actual and calculated XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideoxalic acid co-crystal Form I.

FIG. 7: DSC for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I.

FIG. 8: DSC for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1%2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III.

FIG. 9: DSC for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

FIG. 10: TGA for (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I.

FIG. 11: TGA for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III.

FIG. 12: TGA for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

FIG. 13: DVS for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I.

FIG. 14: DVS for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III.

FIG. 15: DVS for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

FIG. 16: Calculated and Experimental XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I.

DETAILED DESCRIPTION

In the following description, certain specific details are set forth inorder to provide a thorough understanding of various embodiments of theinvention. However, one skilled in the art will understand that theinvention may be practiced without these details. The description belowof several embodiments is made with the understanding that the presentdisclosure is to be considered as an exemplification of the claimedsubject matter, and is not intended to limit the appended claims to thespecific embodiments illustrated. The headings used throughout thisdisclosure are provided for convenience only and are not to be construedto limit the claims in any way. Embodiments illustrated under anyheading may be combined with embodiments illustrated under any otherheading.

Definitions

Unless the context requires otherwise, throughout the presentspecification and claims, the word “comprise” and variations thereof,such as, “comprises” and “comprising” are to be construed in an open,inclusive sense, that is as “including, but not limited to”.

Reference throughout this specification to “one embodiment” or “anembodiment” means that a particular feature, structure or characteristicdescribed in connection with the embodiment is included in at least oneembodiment of the present invention. Thus, the appearances of thephrases “in one embodiment” or “in an embodiment” in various placesthroughout this specification are not necessarily all referring to thesame embodiment. Furthermore, the particular features, structures, orcharacteristics may be combined in any suitable manner in one or moreembodiments.

Embodiments that reference throughout this specification to “a compound”or “e.g. Formulas (I), (II), and/or (III)” includes the polymorphic,salt, co-crystal, and solvate forms of the formulas and/or compoundsdisclosed herein. Thus, the appearances or the phrases “a compound” or“e.g. Formulas (I), (II), and/or (III)” includes Forms I-VIII of FormulaI, Form I of Formula II, Forms I-II of Formula III, and/or the fumaricacid, citric acid, and oxalic acid co-crystals as described herein.

The invention disclosed herein is also meant to encompass allpharmaceutically acceptable compounds of Formulas (I), (II), and (III)being isotopically-labeled by having one or more atoms replaced by anatom having a different atomic mass or mass number. Examples of isotopesthat can be incorporated into the disclosed compounds include isotopesof hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine, chlorine,and iodine, such as ²H, ³H, ¹¹C, ¹³C ¹⁴C, ¹³N, ¹⁵N, ¹⁵O, ¹⁷O, ¹⁸O, ³¹P,³²P, ³⁵S, ¹⁸F, ³⁶Cl, ¹²³I, and ¹²⁵I, respectively. These radiolabeledcompounds could be useful to help determine or measure the effectivenessof the compounds, by characterizing, for example, the site or mode ofaction, or binding affinity to pharmacologically important site ofaction. Certain isotopically-labeled compounds of Formulas (I), (II) and(III), for example, those incorporating a radioactive isotope, areuseful in drug and/or substrate tissue distribution studies. Theradioactive isotopes tritium, i.e. ³H, and carbon-14, i.e. ¹⁴C, areparticularly useful for this purpose in view of their ease ofincorporation and ready means of detection.

Substitution with heavier isotopes such as deuterium, i.e. ²H, mayafford certain therapeutic advantages resulting from greater metabolicstability. For example, in vivo half-life may increase or dosagerequirements may be reduced. Thus, heavier isotopes may be preferred insome circumstances.

Substitution with positron emitting isotopes, such as ¹¹C, ¹⁸F, ¹⁵O and¹³N, can be useful in Positron Emission Topography (PET) studies forexamining substrate receptor occupancy. Isotopically-labeled compoundsof Formulas (I), (II), (III) can generally be prepared by conventionaltechniques known to those skilled in the art or by processes analogousto those described in the Examples as set out below using an appropriateisotopically-labeled reagent in place of the non-labeled reagentpreviously employed.

“Stable compound” and “stable structure” are meant to indicate acompound that is sufficiently robust to survive isolation to a usefuldegree of purity from a reaction mixture, and formulation into anefficacious therapeutic agent.

“Optional” or “optionally” means that the subsequently described eventor circumstances may or may not occur, and that the description includesinstances where said event or circumstance occurs and instances in whichit does not. For example, “optionally substituted aryl” means that thearyl radical may or may not be substituted and that the descriptionincludes both substituted aryl radicals and aryl radicals having nosubstitution.

“Pharmaceutically acceptable carrier, diluent or excipient” includeswithout limitation any adjuvant, carrier, excipient, glidant, sweeteningagent, diluent, preservative, dye/colorant, flavor enhancer, surfactant,wetting agent, dispersing agent, suspending agent, stabilizer, isotonicagent, solvent, or emulsifier which has been approved by the UnitedStates Food and Drug Administration as being acceptable for use inhumans or domestic animals.

A “pharmaceutical composition” refers to a formulation of a compound ofthe invention and a medium generally accepted in the art for thedelivery of the biologically active compound to mammals, e.g., humans.Such a medium includes all pharmaceutically acceptable carriers,diluents or excipients therefor.

“Effective amount” or “therapeutically effective amount” refers to anamount of a compound according to the invention, which when administeredto a patient in need thereof, is sufficient to effect treatment fordisease-states, conditions, or disorders for which the compounds haveutility. Such an amount would be sufficient to elicit the biological ormedical response of a tissue system, or patient that is sought by aresearcher or clinician. The amount of a compound according to theinvention which constitutes a therapeutically effective amount will varydepending on such factors as the compound and its biological activity,the composition used for administration, the time of administration, theroute of administration, the rate of excretion of the compound, theduration of the treatment, the type of disease-state or disorder beingtreated and its severity, drugs used in combination with orcoincidentally with the compounds of the invention, and the age, bodyweight, general health, sex and diet of the patient. Such atherapeutically effective amount can be determined routinely by one ofordinary skill in the art having regard to their own knowledge, thestate of the art, and this disclosure.

In certain embodiments, the term “treatment” is intended to mean theadministration of a compound or composition according to the presentinvention to alleviate or eliminate symptoms of HIV infection and/or toreduce viral load in a patient. The term “treatment” also encompassesthe administration of a compound or composition according to the presentinvention post-exposure of the individual to the virus but before theappearance of symptoms of the disease, and/or prior to the detection ofthe virus in the blood, to prevent the appearance of symptoms of thedisease and/or to prevent the virus from reaching detectible levels inthe blood, and the administration of a compound or composition accordingto the present invention to prevent perinatal transmission of HIV frommother to baby, by administration to the mother before giving birth andto the child within the first days of life. In certain embodiments, theterm “treatment” as used herein is intended to mean the administrationof a compound or composition according to the present invention toalleviate or eliminate symptoms of HIV infection and/or to reduce viralload in a patient. In certain embodiments, the term “treatment” as usedherein is further or alternatively intended to mean the administrationof a compound or composition according to the present invention tomaintain a reduced viral load in a patient. The term “treatment” alsoencompasses the administration of a compound or composition according tothe present invention post-exposure of the individual to the virus butbefore the appearance of symptoms of the disease; and/or prior to thedetection of the virus in the blood, to prevent the appearance ofsymptoms of the disease and/or to prevent the virus from reachingdetectable levels in the blood, and the administration of a compound orcomposition according to the present invention to prevent perinataltransmission of HIV from mother to baby, by administration to the motherbefore giving birth and to the child within the first days of life. Incertain embodiments, the term “treatment” as used herein is further oralternatively intended to mean the administration of a compound orcomposition according to the present invention post-exposure of theindividual to the virus as a subsequent or additional therapy to afirst-line therapy (e.g., for maintenance of low viral load).

“Prevention” or “preventing” means any treatment of a disease orcondition that causes the clinical symptoms of the disease or conditionnot to develop. The term “prevention” also encompasses theadministration of a compound or composition according to the presentinvention pre-exposure of the individual to the virus (e.g.,pre-exposure prophylaxis), to prevent the appearance of symptoms of thedisease and/or to prevent the virus from reaching detectable levels inthe blood.

The terms “Subject” or “patient” refer to an animal, such as a mammal(including a human), that has been or will be the object of treatment,observation or experiment. The methods described herein may be useful inhuman therapy and/or veterinary applications. In some embodiments, thesubject is a mammal (or the patient). In some embodiments the subject(or the patient) is human, domestic animals (e.g., dogs and cats), farmanimals (e.g., cattle, horses, sheep, goats and pigs), and/or laboratoryanimals (e.g., mice, rats, hamsters, guinea pigs, pigs, rabbits, dogs,and monkeys). In one embodiment, the subject (or the patient) is ahuman. “Human (or patient) in need thereof” refers to a human who mayhave or is suspect to have diseases or conditions that would benefitfrom certain treatment; for example, being treated with the compoundsdisclosed herein according to the present application.

The term “antiviral agent” as used herein is intended to mean an agent(compound or biological) that is effective to inhibit the formationand/or replication of a virus in a human being, including but notlimited to agents that interfere with either host or viral mechanismsnecessary for the formation and/or replication of a virus in a humanbeing.

The term “inhibitor of HIV replication” as used herein is intended tomean an agent capable of reducing or eliminating the ability of HIV toreplicate in a host cell, whether in vitro, ex vivo or in vivo.

A “tautomer” refers to a proton shift from one atom of a molecule toanother atom of the same molecule. The present invention includestautomers of any said compounds.

Reference to “about” a value or parameter herein includes (anddescribes) embodiments that are directed to that value or parameter perse. For example, description referring to “about X” includes descriptionof “X”. Also, the singular forms “a” and “the” include plural referencesunless the context clearly dictates otherwise. Thus, e.g., reference to“the compound” includes a plurality of such compounds and reference to“the assay” includes reference to one or more assays and equivalentsthereof known to those skilled in the art.

“Pharmaceutically acceptable” or “physiologically acceptable” refer tocompounds, salts, compositions, dosage forms and other materials whichare useful in preparing a pharmaceutical composition that is suitablefor veterinary or human pharmaceutical use.

“Unit dosage forms” are physically discrete units suitable as unitarydosages for subjects (e.g., human subjects and other mammals), each unitcontaining a predetermined quantity of active material calculated toproduce the desired therapeutic effect, in association with a suitablepharmaceutical carrier.

Crystalline Forms

Formula I

It is desirable to develop a crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidethat may be useful in the synthesis of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.A form of a(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidemay be an intermediate to the synthesis of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.A polymorphic form or polymorph or cocrystal may have properties such asbioavailability and stability at certain conditions that may be suitablefor medical or pharmaceutical uses.

A crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidemay provide the advantage of bioavailability and stability, suitable foruse as an active ingredient in a pharmaceutical composition. Variationsin the crystal structure of a pharmaceutical drug substance or activeingredient may affect the dissolution rate (which may affectbioavailability, etc.), manufacturability (e.g., ease of handling,ability to consistently prepare doses of known strength) and stability(e.g., thermal stability, shelf life, etc.) of a pharmaceutical drugproduct or active ingredient. Such variations may affect the preparationor formulation of pharmaceutical compositions in different dosage ordelivery forms, such as solid oral dosage form including tablets andcapsules. Compared to other forms such as non-crystalline or amorphousforms, crystalline forms may provide desired or suitable hygroscopicity,particle size controls, dissolution rate, solubility, purity, physicaland chemical stability, manufacturability, yield, and/or processcontrol. Thus, crystalline forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidemay provide advantages such as: improving the manufacturing process ofan active agent or the stability or storability of a drug product formof the compound or an active ingredient, and/or having suitablebioavailability and/or stability as an active agent.

The use of certain solvents has been found to produce differentpolymorphic forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,including any one or more of polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, which may exhibit one or more favorable characteristicsdescribed above. The processes for the preparation of the polymorphsdescribed herein, and characterization of these polymorphs are describedin greater detail below.

The compound name provided above is named using ChemBioDraw Ultra andone skilled in the art understands that the compound structure may benamed or identified using other commonly recognized nomenclature systemsand symbols. By way of example, the compound may be named or identifiedwith common names, systematic or non-systematic names. The nomenclaturesystems and symbols that are commonly recognized in the art of chemistryincluding but not limited to Chemical Abstract Service (CAS) andInternational Union of Pure and Applied Chemistry (IUPAC). Accordingly,the compound structure provided above may also be named or identified as(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideunder IUPAC and2,5-Methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,2,3,4,5,7,9,13,13a-octahydro-8-hydroxy-7,9-dioxo-N-[(2,4,6-trifluorophenyl)methyl]-,(2R,5S,13aR)- under CAS; CAS Registry Number 1611493-60-7.

In particular embodiments, crystalline forms and co-crystals of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideare disclosed.

Formula 1, Form I

In one embodiment, provided is polymorphic Form I of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the polymorph exhibits an X-ray powder diffraction (XRPD)pattern substantially as shown in FIG. 1. Polymorphic Form I may exhibita differential scanning calorimetry (DSC) thermogram substantially asshown in FIG. 7. Polymorphic Form I may exhibit a thermographic analysis(TGA) graph substantially as shown in FIG. 10. Polymorphic Form I mayexhibit dynamic vapour sorption (DVS) graphs substantially as shown inFIG. 13.

The term “substantially as shown in” when referring, for example, to anXRPD pattern, a DSC thermogram, or a TGA graph includes a pattern,thermogram or graph that is not necessarily identical to those depictedherein, but that falls within the limits of experimental error ordeviations when considered by one of ordinary skill in the art.

Polymorphic Form I may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=11.4498 (4)Å; b=8.4767(3)Å; c=19.9163 (8)Å; α=90°; β=106.286 (2)°; and γ=90°.

In some embodiments of polymorphic Form I, at least one, at least two,at least three, at least four, at least five, at least six, at leastseven, at least eight, at least nine, at least ten, or all of thefollowing (a)-(k) apply: (a) polymorphic Form I has an XRPD patternsubstantially as shown in FIG. 1; (b) polymorphic Form I has a DSCthermogram substantially as shown in FIG. 7; (c) polymorphic Form I hasa TGA graph substantially as shown in FIG. 10; (d) polymorphic Form Ihas DVS graphs substantially as shown in FIG. 13; (e) polymorphic Form Ihas a unit cell, as determined by crystal X-ray crystallography, of thefollowing dimensions: a=11.4498 (4)Å; b=8.4767 (3)Å; c=19.9163 (8)Å;α=90°; β=106.286 (2)°; and γ=90°; (f) polymorphic Form I has anendothermic event onset; (g) polymorphic Form I has a monoclinic crystalsystem; (h) polymorphic Form I has a P2(1) space group; (i) polymorphicForm I has a volume of 1855.44(12)Å³; (j) polymorphic Form I has a Zvalue of 4; and (k) polymorphic Form I has a density of 1.609 g/cm³.

In some embodiments, polymorphic Form I has at least one, at least two,at least three, or all of the following properties:

-   -   (a) an XRPD pattern substantially as shown in FIG. 1;    -   (b) a DSC thermogram substantially as shown in FIG. 7;    -   (c) DVS graphs substantially as shown in FIG. 13; and    -   (d) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=11.4498 (4)Å; b=8.4767 (3)Å;        c=19.9163 (8)Å; α=90°; β=106.286 (2)°; and γ=90°.

In some embodiments, polymorphic Form I has an XRPD pattern displayingat least two, at least three, at least four, at least five, or at leastsix of the degree 2θ-reflections with the greatest intensity as the XRPDpattern substantially as shown in FIG. 1.

In certain embodiments, polymorphic Form I has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 27.4, 13.1, and17.4. In one embodiment, polymorphic Form I has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 27.4, 13.1, and17.4 and one or more of the degree 2θ-reflections (+/−0.2 degrees 2θ) at10.5, 20.6, and 25.0. In one embodiment, polymorphic Form I has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 27.4,13.1, and 17.4 and one of the degree 2θ-reflections (+/−0.2 degrees 2θ)at 10.5, 20.6, and 25.0. In one embodiment, polymorphic Form I has anXRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at27.4, 13.1, and 17.4 and two of the degree 2θ-reflections (+/−0.2degrees 2θ) at 10.5, 20.6, and 25.0. In one embodiment, polymorphic FormI has an XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees2θ) at 27.4, 13.1, and 17.4 and three of the degree 2θ-reflections(+/−0.2 degrees 2θ) at 10.5, 20.6, and 25.0. In one embodiment,polymorphic Form I has an XRPD pattern comprising degree 2θ-reflections(+/−0.2 degrees 2θ) at 27.4, 13.1, 17.4, 10.5, 20.6, and 25.0. In oneembodiment, polymorphic Form I has an XRPD pattern comprising degree2θ-reflections (+/−0.2 degrees 2θ) at 27.4, 13.1, 17.4, 10.5, 20.6,25.0, 16.2, and 22.3. In one embodiment, polymorphic Form I has an XRPDpattern comprising any three degree 2θ-reflections (+/−0.2 degrees 2θ)selected from the group consisting of 27.4, 13.1, 17.4, 10.5, 20.6,25.0, 16.2, 22.3, 13.9, 11.4, and 9.3.

Formula 1, Form II

In one embodiment, provided is polymorphic Form II of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the polymorph exhibits an X-ray powder diffraction (XRPD)pattern substantially as shown in FIG. 2.

Polymorphic Form II may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=8.5226 (7)Å; b=26.934(2)Å; c=8.6861 (8)Å; α=90°; β=101.862 (2)°; and γ=90°.

In some embodiments of polymorphic Form II, at least one, at least two,at least three, at least four, at least five, at least six, or all ofthe following (a)-(g) apply: (a) polymorphic Form II has an XRPD patternsubstantially as shown in FIG. 2; (b) polymorphic Form II has a unitcell, as determined by crystal X-ray crystallography, of the followingdimensions: a=8.5226 (7)Å; b=26.934 (2)Å; c=8.6861 (8)Å; α=90°;β=101.862 (2)°; and γ=90°; (c) polymorphic Form II has a monocliniccrystal system; (d) polymorphic Form II has a P2(1) space group; (e)polymorphic Form II has a volume of 1951.3(3)Å³; (f) polymorphic Form IIhas a Z value of 4; and (g) polymorphic Form II has a density of 1.537Mg/m³.

In some embodiments, polymorphic Form II has at least one, or all of thefollowing properties:

-   -   (a) an XRPD pattern substantially as shown in FIG. 2;    -   (b) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=8.5226 (7)Å; b=26.934 (2)Å;        c=8.6861 (8)Å; α=90°; β=101.862 (2)°; and γ=90°.

In some embodiments, polymorphic Form II has an XRPD pattern displayingat least two, at least three, at least four, at least five, or at leastsix of the degree 2θ-reflections with the greatest intensity as the XRPDpattern substantially as shown in FIG. 2.

In certain embodiments, polymorphic Form II has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 6.6, 21.4, and10.6. In one embodiment, polymorphic Form II has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 6.6, 21.4, and10.6 and one or more of the degree 2θ-reflections (+/−0.2 degrees 2θ) at12.5, 16.2, and 14.3. In one embodiment, polymorphic Form II has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 6.6,21.4, and 10.6 and one of the degree 2θ-reflections (+/−0.2 degrees 2θ)at 12.5, 16.2, and 14.3. In one embodiment, polymorphic Form II has anXRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at6.6, 21.4, and 10.6 and two of the degree 2θ-reflections (+/−0.2 degrees2θ) at 12.5, 16.2, and 14.3. In one embodiment, polymorphic Form II hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at6.6, 21.4, and 10.6 and three of the degree 2θ-reflections (+/−0.2degrees 2θ) at 12.5, 16.2, and 14.3. In one embodiment, polymorphic FormII has an XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees2θ) at 6.6, 21.4, 10.6, 12.5, 16.2, and 14.3. In one embodiment,polymorphic Form II has an XRPD pattern comprising degree 2θ-reflections(+/−0.2 degrees 2θ) at 6.6, 21.4, 10.6, 12.5, 16.2, 14.3, 25.6, and23.5. In one embodiment, polymorphic Form II has an XRPD patterncomprising any three degree 2θ-reflections (+/−0.2 degrees 2θ) selectedfrom the group consisting of 6.6, 21.4, 10.6, 12.5, 16.2, 14.3, 25.6,and 23.5.

Formula 1, Form III

In one embodiment, provided is polymorphic Form III of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the polymorph exhibits an X-ray powder diffraction (XRPD)pattern substantially as shown in FIG. 3. Polymorphic Form III mayexhibit a differential scanning calorimetry (DSC) thermogramsubstantially as shown in FIG. 8. Polymorphic Form III may exhibit athermographic analysis (TGA) graph substantially as shown in FIG. 11.Polymorphic Form III may exhibit dynamic vapour sorption (DVS) graphssubstantially as shown in FIG. 14.

Polymorphic Form III may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=18.002 (2)Å; b=10.9514(12)Å; c=20.687 (2)Å; α=90°; β=107.770 (4)°; and γ=90°.

In some embodiments of polymorphic Form III, at least one, at least two,at least three, at least four, at least five, at least six, at leastseven, at least eight, at least nine, at least ten, or all of thefollowing (a)-(k) apply: (a) polymorphic Form III has an XRPD patternsubstantially as shown in FIG. 3; (b) polymorphic Form III has a DSCthermogram substantially as shown in FIG. 8; (c) polymorphic Form IIIhas a TGA graph substantially as shown in FIG. 11; (d) polymorphic FormIII has DVS graphs substantially as shown in FIG. 14; (e) polymorphicForm III has a unit cell, as determined by crystal X-raycrystallography, of the following dimensions: a=18.002 (2)Å; b=10.9514(12)Å; c=20.687 (2)Å; α=90°; β=107.770 (4)°; and γ=90°; (f) polymorphicForm I has an endothermic event onset (g) polymorphic Form III has amonoclinic crystal system; (h) polymorphic Form III has a P2(1) spacegroup; (i) polymorphic Form III has a volume of 3884.0(8)Å³; (j)polymorphic Form III has a Z value of 8; and (k) polymorphic Form IIIhas a density of 1.537 g/cm³.

In some embodiments, polymorphic Form III has at least one, at leasttwo, at least three, or all of the following properties:

-   -   (a) an XRPD pattern substantially as shown in FIG. 3;    -   (b) a DSC thermogram substantially as shown in FIG. 8;    -   (c) DVS graphs substantially as shown in FIG. 14; and    -   (d) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=18.002 (2)Å; b=10.9514 (12)Å;        c=20.687 (2)Å; α=90°; β=107.770(4)°; and γ=90°.

In some embodiments, polymorphic Form III has an XRPD pattern displayingat least two, at least three, at least four, at least five, or at leastsix of the degree 2θ-reflections with the greatest intensity as the XRPDpattern substantially as shown in FIG. 3.

In certain embodiments, polymorphic Form III has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 20.0, 18.5, and9.6. In one embodiment, polymorphic Form III has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 20.0, 18.5, and9.6 and one or more of the degree 2θ-reflections (+/−0.2 degrees 2θ) at22.5, 14.0, and 25.0. In one embodiment, polymorphic Form III has anXRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at20.0, 18.5, and 9.6 and one of the degree 2θ-reflections (+/−0.2 degrees2θ) at 22.5, 14.0, and 25.0. In one embodiment, polymorphic Form III hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at20.0, 18.5, and 9.6 and two of the degree 2θ-reflections (+/−0.2 degrees2θ) at 22.5, 14.0, and 25.0. In one embodiment, polymorphic Form III hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at20.0, 18.5, and 9.6 and three of the degree 2θ-reflections (+/−0.2degrees 2θ) at 22.5, 14.0, and 25.0. In one embodiment, polymorphic FormIII has an XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees2θ) at 20.0, 18.5, 9.6, 22.5, 14.0, and 25.0. In one embodiment,polymorphic Form III has an XRPD pattern comprising degree2θ-reflections (+/−0.2 degrees 2θ) at 20.0, 18.5, 9.6, 22.5, 14.0, 25.0,12.1, and 27.0. In one embodiment, polymorphic Form III has an XRPDpattern comprising any three degree 2θ-reflections (+/−0.2 degrees 2θ)selected from the group consisting of 20.0, 18.5, 9.6, 22.5, 14.0, 25.0,12.1, 27.0, 16.2, and 29.0.

Formula 1, Form IV

In one embodiment, provided is polymorphic Form IV of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the polymorph exhibits an X-ray powder diffraction (XRPD)pattern substantially as shown in FIG. 4.

Polymorphic Form IV may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=29.948 (2)Å; b=16.5172(9)Å; c=13.2051 (8)Å; α=90°, β=108.972 (4)°; and γ=90°.

In some embodiments of polymorphic Form IV, at least one, at least two,at least three, at least four, at least five, at least six, or all ofthe following (a)-(g) apply: (a) polymorphic Form IV has an XRPD patternsubstantially as shown in FIG. 4; (b) polymorphic Form IV has a unitcell, as determined by crystal X-ray crystallography, of the followingdimensions: a=29.948 (2)Å; b=16.5172 (9)Å; c=13.2051 (8)Å; α=90°;β=108.972 (4)°; and γ=90°; (c) polymorphic Form IV has a monocliniccrystal system; (d) polymorphic Form IV has a C2 space group; (e)polymorphic Form IV has a volume of 6177.3(7)Å³; (f) polymorphic Form IVhas a Z value of 12; and (g) polymorphic Form IV has a density of 1.484Mg/m³.

In some embodiments, polymorphic Form IV has at least one, or all of thefollowing properties:

-   -   (a) an XRPD pattern substantially as shown in FIG. 4;    -   (b) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=29948 (2)Å; b=16.5172 (9)Å;        c=13.2051 (8)Å; α=90°; β=108.972 (4)°; and γ=90°.

In some embodiments, polymorphic Form IV has an XRPD pattern displayingat least two, at least three, at least four, at least five, or at leastsix of the degree 2θ-reflections with the greatest intensity as the XRPDpattern substantially as shown in FIG. 4.

In certain embodiments, polymorphic Form IV has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 16.3, 6.2, and8.6. In one embodiment, polymorphic Form IV has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 16.3, 6.2, and8.6 and one or more of the degree 2θ-reflections (+/−0.2 degrees 2θ) at22.7, 22.3, and 25.8. In one embodiment, polymorphic Form IV has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 16.3,6.2, and 8.6 and one of the degree 2θ-reflections (+/−0.2 degrees 2θ) at22.7, 22.3, and 25.8. In one embodiment, polymorphic Form IV has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 16.3,6.2, and 8.6 and two of the degree 2θ-reflections (+/−0.2 degrees 2θ) at22.7, 22.3, and 25.8. In one embodiment, polymorphic Form IV has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 16.3,6.2, and 8.6 and three of the degree 2θ-reflections (+/−0.2 degrees 2θ)at 22.7, 22.3, and 25.8. In one embodiment, polymorphic Form IV has anXRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at16.3, 6.2, 8.6, 22.7, 22.3, and 25.8. In one embodiment, polymorphicForm IV has an XRPD pattern comprising degree 2θ-reflections (+/−0.2degrees 2θ) at 16.3, 6.2, 8.6, 22.7, 22.3, 25.8, 20.0, and 18.7. In oneembodiment, polymorphic Form IV has an XRPD pattern comprising any threedegree 2θ-reflections (+/−0.2 degrees 2θ) selected from the groupconsisting of 16.3, 6.2, 8.6, 22.7, 22.3, 25.8 20.0, 18.7, 27.7, and13.2.

Formula 1, Form V

In one embodiment, provided is polymorphic Form V of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1″,2″:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Polymorphic Form V may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=8.4993 (6)Å; b=8.7290(8)Å; c=13.8619 (13)Å; α=99.278 (5)°; β=101.427 (4)°; and γ=100.494(4)°.

In some embodiments of polymorphic Form V, at least one, at least two,at least three, at least four, at least five, or all of the following(a)-(f) apply: (a) polymorphic Form V has a unit cell, as determined bycrystal X-ray crystallography, of the following dimensions: a=8.4993 (6)Å; b=8.7290 (8)Å; c=13.8619 (13)Å; α=99.278 (5)°; β=101.427 (4)°; andγ=100.494 (4)°; (b) polymorphic Form V has a triclinic crystal system;(c) polymorphic Form V has a P2(1) space group; (d) polymorphic Form Vhas a volume of 970.18(14)Å³; (e) polymorphic Form V has a Z value of 2;and (f) polymorphic Form V has a density of 1.573 Mg/m³.

In some embodiments, polymorphic Form V has the following properties:

a unit cell, as determined by crystal X-ray crystallography, of thefollowing dimensions: a=8.4993 (6)Å; b=8.7290 (8)Å; c=13.8619 (13)Å;α=99.278 (5)°; β=101.427 (4)°; and γ=100.494 (4)°.

Formula 1, Form VI

In one aspect, provided is polymorphic Form VI of a(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1″,2″:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Polymorphic Form VI may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=19.5163 (5)Å; b=6.4593(2)Å; c=16.6066 (5)Å; α=90°; β=103.5680 (13)°; and γ=90°.

In some embodiments of polymorphic Form VI, at least one, at least two,at least three, at least four, at least five, or all of the following(a)-(f) apply: (a) polymorphic Form VI has a unit cell, as determined bycrystal X-ray crystallography, of the following dimensions: a=19.5163(5)Å; b=6.4593 (2)Å; c=16.6066 (5)Å; α=90°; β=103.5680 (13)°; and γ=90°;(b) polymorphic Form VI has a monoclinic crystal system; (c) polymorphicForm V has a P2(1) space group; (d) polymorphic Form VI has a volume of2035.03(10)Å³; (e) polymorphic Form V has a Z value of 4; and (f)polymorphic Form V has a density of 1.545 Mg/m³.

In some embodiments, polymorphic Form VI has the following properties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=19.5163 (5)Å; b=6.4593 (2)Å;        c=16.6066 (5)Å; α=90°; β=103.5680 (13)°; and γ=90°.

Formula 1, Form VII

In one embodiment, provided is polymorphic Form VII of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Polymorphic Form VII may have a unit cell as determined by crystal X-raycrystallography of the following dimensions: a=30.785 (12)Å; b=16.685(6)Å; c=25.956 (10)Å; α=90°; β=108.189 (10)°; and γ=90°.

In some embodiments of polymorphic Form VII, at least one, at least two,at least three, at least four, at least five, or all of the following(a)-(f) apply: (a) polymorphic Form VII has a unit cell, as determinedby crystal X-ray crystallography, of the following dimensions: a=30.785(12)Å; b=16.685 (6)Å; c=25.956 (10)Å; α=90°; β=108.189 (10)°; and γ=90°;(b) polymorphic Form VII has a monoclinic crystal system; (c)polymorphic Form VII has a P2(1) space group; (d) polymorphic Form VIhas a volume of 12666(8)Å³; (e) polymorphic Form VII has a Z value of24; and (f) polymorphic Form VII has a density of 1.468 Mg/m³.

In some embodiments, polymorphic Form VI has the following properties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=30.785 (12)Å; b=16.685 (6)Å;        c=25.956 (10)Å; α=90°; β=108.189 (10)°; and γ=90°.

Formula 1, Form VIII

In one embodiment, provided is polymorphic Form VIII of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Polymorphic Form VIII may have a unit cell as determined by crystalX-ray crystallography of the following dimensions: a=10.3242 (18)Å;b=10.7826 (17)Å; c=17.848 (3)Å; α=90°; β=105.578 (8)°; and γ=90°.

In some embodiments of polymorphic Form VIII, at least one, at leasttwo, at least three, at least four, at least five, or all of thefollowing (a)-(f) apply: (a) polymorphic Form VIII has a unit cell, asdetermined by crystal X-ray crystallography, of the followingdimensions: a=10.3242 (18)Å; b=10.7826 (17)Å; c=17.848 (3)Å; α=90°;β=105.578 (8)°; and γ=90°; (b) polymorphic Form VIII has a monocliniccrystal system; (c) polymorphic Form VIII has a C2 space group; (d)polymorphic Form VIII has a volume of 1913.9(6)Å³; (e) polymorphic FormVIII has a Z value of 4; and (f) polymorphic Form VIII has a density of1.560 Mg/m³.

In some embodiments, polymorphic Form VIII has the following properties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions: a=10.3242 (18)Å; b=10.7826 (17)Å;        c=17.848 (3)Å; α=90°; β=105.578 (8)°; and γ=90°.

Formula II

It is desirable to develop a crystalline form of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatethat may be useful in the synthesis of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.A form of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay be an intermediate to the synthesis of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.A form of sodium(2R,5S,13aR)-7,9-dioxo-10-(2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay be the final product in the synthesis of sodium(2R,5S,13aR)-7,9-dioxo-10-(2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.A polymorphic form or polymorph or cocrystal may have properties such asbioavailability and stability at certain conditions that may be suitablefor medical or pharmaceutical uses.

A crystalline form of sodium(2R,5S,13aR)-7,9-dioxo-10-(2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay provide the advantage of bioavailability and stability, suitable foruse as an active ingredient in a pharmaceutical composition. In certainembodiments, a crystalline form sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprovides an advantage of improved bioavailability (Table 3) and/orstability (Table 4). Variations in the crystal structure of apharmaceutical drug substance or active ingredient may affect thedissolution rate (which may affect bioavailability, etc.),manufacturability (e.g., ease of handling, ability to consistentlyprepare doses of known strength) and stability (e.g., thermal stability,shelf life, etc.) of a pharmaceutical drug product or active ingredient.Such variations may affect the preparation or formulation ofpharmaceutical compositions in different dosage or delivery forms, suchas solid oral dosage form including tablets and capsules. Compared toother forms such as non-crystalline or amorphous forms, crystallineforms may provide desired or suitable hygroscopicity, particle sizecontrols, dissolution rate, solubility, purity, physical and chemicalstability, manufacturability, yield, and/or process control. Thus,crystalline forms of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay provide advantages such as: improving the manufacturing process ofan active agent or the stability or storability of a drug product formof the compound or an active ingredient, and/or having suitablebioavailability and/or stability as an active agent.

The use of certain solvents has been found to produce differentpolymorphic forms of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,including polymorphic Form I, which may exhibit one or more favorablecharacteristics described above. In certain embodiments, Form I ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprovides an advantage of improved bioavailability (Table 3) and/orstability (Table 4). The processes for the preparation of the polymorphsdescribed herein and characterization of these polymorphs are describedin greater detail below.

The compound name provided above is named using ChemBioDraw Ultra andone skilled in the art understands that the compound structure may benamed or identified using other commonly recognized nomenclature systemsand symbols. By way of example, the compound may be named or identifiedwith common names, systematic or non-systematic names. The nomenclaturesystems and symbols that are commonly recognized in the art of chemistryincluding but not limited to Chemical Abstract Service (CAS) andInternational Union of Pure and Applied Chemistry (IUPAC). Accordingly,the compound structure provided above may be named or identified assodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateunder IUPAC.

In particular embodiments, crystalline forms of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateare disclosed.

Formula II, Form I

In a certain embodiment, novel forms of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,having the following structure (Formula II) are disclosed:

In a further embodiment, crystalline forms of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateare disclosed.

In a certain embodiment, sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is disclosed.

In one embodiment, provided is polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the polymorph exhibits an X-ray powder diffraction (XRPD)pattern substantially as shown in FIG. 5 and/or FIG. 16. Polymorphicsodium Form I may exhibit a differential scanning calorimetry (DSC)thermogram substantially as shown in FIG. 9. Polymorphic sodium Form Imay exhibit a thermographic analysis (TGA) graph substantially as shownin FIG. 12. Polymorphic sodium Form I may exhibit dynamic vapoursorption (DVS) graphs substantially as shown in FIG. 15.

The term “substantially as shown in” when referring, for example, to anXRPD pattern, a DSC thermogram, or a TGA graph includes a pattern,thermogram or graph that is not necessarily identical to those depictedherein, but that falls within the limits of experimental error ordeviations when considered by one of ordinary skill in the art.

Polymorphic sodium Form I may have a unit cell as determined by crystalX-ray crystallography of the following dimensions: a=8.9561 (10)Å;b=13.9202 (14)Å; c=31.115 (3)Å; α=90°; β=90°; and γ=90°.

In some embodiments of polymorphic sodium Form I, at least one, at leasttwo, at least three, at least four, at least five, at least six, atleast seven, at least eight, at least nine, or all of the following(a)-(j) apply: (a) polymorphic Form I has an XRPD pattern substantiallyas shown in FIG. 5 and/or FIG. 16; (b) polymorphic sodium Form I has aDSC thermogram substantially as shown in FIG. 9; (c) polymorphic sodiumForm I has a TGA graph substantially as shown in FIG. 12; (d)polymorphic sodium Form I has DVS graphs substantially as shown in FIG.15; (e) polymorphic sodium Form I has a unit cell, as determined bycrystal X-ray crystallography, of the following dimensions: a=8.9561(10)Å; b=13.9202 (14)Å; c=31.115 (3)Å; α=90°; β=90°; and γ=90°; (f)polymorphic sodium Form I has an orthorhombic crystal system; (g)polymorphic sodium Form I has a P212121 space group; (h) polymorphicsodium Form I has a volume of 3879.2 Å³; (i) polymorphic Form I has a Zvalue of 4; and (j) polymorphic Form I has a density of 1.614 Mg/m³.

In some embodiments, polymorphic sodium Form I has at least one, atleast two, at least three, at least four, or all of the followingproperties:

-   -   (a) an XRPD pattern substantially as shown in FIG. 5 and/or FIG.        16;    -   (b) a DSC thermogram substantially as shown in FIG. 9;    -   (c) TGA graphs substantially as shown in FIG. 12;    -   (d) DVS graphs substantially as shown in FIG. 15; and    -   (e) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=8.9561 (10)Å; b=13.9202 (14)Å;        c=31.115 (3)Å; α=90°; β=90°; and γ=90°;

In some embodiments, polymorphic sodium Form I has an XRPD patterndisplaying at least two, at least three, at least four, at least five,or at least six of the degree 2θ-reflections with the greatest intensityas the XRPD pattern substantially as shown in FIG. 1 and/or FIG. 8.

In certain embodiments, polymorphic sodium Form I has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 5.5, 16.1, and23.3. In one embodiment, polymorphic sodium Form I has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 5.5, 16.1, and23.3 and one or more of the degree 2θ-reflections (+/−0.2 degrees 2θ) at22.1, 28.5, and 22.5. In one embodiment, polymorphic sodium Form I hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at5.5, 16.1, and 23.3 and one of the degree 2θ-reflections (+/−0.2 degrees2θ) at 22.1, 28.5, and 22.5. In one embodiment, polymorphic sodium FormI has an XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees2θ) at 5.5, 16.1, and 23.3 and two of the degree 2θ-reflections (+/−0.2degrees 2θ) at 22.1, 28.5, and 22.5. In one embodiment, polymorphicsodium Form I has an XRPD pattern comprising degree 2θ-reflections(+/−0.2 degrees 2θ) at 5.5, 16.1, and 23.3 and three of the degree2θ-reflections (+/−0.2 degrees 2θ) at 22.1, 28.5, and 22.5. In oneembodiment, polymorphic sodium Form I has an XRPD pattern comprisingdegree 2θ-reflections (+/−0.2 degrees 2θ) at 5.5, 16.1, 23.3, 22.1,28.5, and 22.5. In one embodiment, polymorphic sodium Form I has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 5.5,16.1, 23.3, 22.1, 28.5, 22.5, 19.5, and 26.6. In one embodiment,polymorphic sodium Form I has an XRPD pattern comprising any threedegree 2θ-reflections (+/−0.2 degrees 2θ) selected from the groupconsisting of 5.5, 16.1, 23.3, 22.1, 28.5, 22.5, 19.5, 26.6, and 17.9.

Formula III

It is desirable to develop a crystalline form of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatethat may be useful in the synthesis of potassium(2R,5S,13aR)-7,9-dioxo-10-(2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.A form of a potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay be an intermediate to the synthesis of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.A polymorphic form or polymorph or cocrystal may have properties such asbioavailability and stability at certain conditions that may be suitablefor medical or pharmaceutical uses.

A crystalline form of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay provide the advantage of bioavailability and stability, suitable foruse as an active ingredient in a pharmaceutical composition. Variationsin the crystal structure of a pharmaceutical drug substance or activeingredient may affect the dissolution rate (which may affectbioavailability, etc.), manufacturability (e.g., ease of handling,ability to consistently prepare doses of known strength) and stability(e.g., thermal stability, shelf life, etc.) of a pharmaceutical drugproduct or active ingredient. Such variations may affect the preparationor formulation of pharmaceutical compositions in different dosage ordelivery forms, such as solid oral dosage form including tablets andcapsules. Compared to other forms such as non-crystalline or amorphousforms, crystalline forms may provide desired or suitable hygroscopicity,particle size controls, dissolution rate, solubility, purity, physicaland chemical stability, manufacturability, yield, and/or processcontrol. Thus, crystalline forms of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatemay provide advantages such as: improving the manufacturing process ofan active agent or the stability or storability of a drug product formof the compound or an active ingredient, and/or having suitablebioavailability and/or stability as an active agent.

The use of certain solvents has been found to produce differentpolymorphic forms of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,including any one or more of polymorphic Forms I, II, and III which mayexhibit one or more favorable characteristics described above. Theprocesses for the preparation of the polymorphs described herein, andcharacterization of these polymorphs are described in greater detailbelow.

The compound name provided above is named using ChemBioDraw Ultra andone skilled in the art understands that the compound structure may benamed or identified using other commonly recognized nomenclature systemsand symbols. By way of example, the compound may be named or identifiedwith common names, systematic or non-systematic names. The nomenclaturesystems and symbols that are commonly recognized in the art of chemistryincluding but not limited to Chemical Abstract Service (CAS) andInternational. Union of Pure and Applied Chemistry (IUPAC). Accordingly,the compound structure provided above may be named or identified aspotassium (2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateunder IUPAC.

In particular embodiments, crystalline forms and co-crystals ofpotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateare disclosed.

In yet a further embodiment, novel forms of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,having the following structure (Formula III) are disclosed.

In yet another embodiment, potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is disclosed.

In yet another embodiment, potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm II is disclosed.

In yet another embodiment, potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm III is disclosed.

In a still other embodiment, hydrated potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateis disclosed.

Formula III, Form I

In one aspect, provided is polymorphic Form I of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

Polymorphic potassium Form I may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=32.0409(11)Å; b=10.2935 (4)Å; c=15.4691 (7)Å; α=90°; β=90°; and γ=90°.

In some embodiments of polymorphic potassium Form I, at least one, atleast two, at least three, at least four, at least five, or all of thefollowing (a)-(f) apply: (a) polymorphic potassium Form I has a unitcell, as determined by crystal X-ray crystallography, of the followingdimensions: a=32.0409 (11)Å; b=10.2935 (4)Å; c=15.4691 (7)Å; α=90°;β=90°; and γ=90°; (b) potassium Form I has an orthorhombic crystalsystem; (c) polymorphic potassium Form I has a P21 21 2 space group; (d)polymorphic potassium Form I has a volume of 5101.9(4)Å³; (e)polymorphic potassium Form I has a Z value of 8; and (f) potassium FormI has a density of 1.498 Mg/m³.

In some embodiments, polymorphic potassium Form I has the followingproperties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=32.0409 (11)Å; b=10.2935 (4)Å;        c=15.4691 (7)Å; α=90°; β=90°; and γ=90°.

Formula III, Form II (Dimer)

In one aspect, provided is polymorphic Form II of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

Polymorphic potassium Form II may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=32.0285(17)Å; b=10.3029 (7)Å; c=15.5363 (10)Å; α=90°; β=90°; and γ=90°.

In some embodiments of potassium Form II, at least one, at least two, atleast three, at least four, at least five, or all of the following(a)-(t) apply: (a) polymorphic potassium Form II has a unit cell, asdetermined by crystal X-ray crystallography, of the followingdimensions: a=32.0285 (17)Å; b=10.3029 (7)Å; c=15.5363 (10)Å; α=90°;p=90°; and γ=90°; (b) polymorphic potassium Form II has an orthorhombiccrystal system; (c) polymorphic potassium Form II has a P 21 21 2 spacegroup; (d) polymorphic potassium Form II has a volume of 5126.8(6)Å³;(e) polymorphic potassium Form II has a Z value of 4; and (f)polymorphic potassium Form II has a density of 1.336 Mg/m³.

In some embodiments, polymorphic potassium Form II has the followingproperties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=32.0285 (17)Å; b=10.3029 (7)Å;        c=15.5363 (10)Å; α=90°; p=90°; and γ=90°.

Formula III, Form III

In one aspect, provided is polymorphic Form III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

Polymorphic potassium Form III may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=8.8412(3)Å; b=10.8837 (4)Å; c=13.9107 (5)Å; α=71.3620 (1)°; β=76.343 (2)°; andγ=82.943 (2)°.

In some embodiments of polymorphic potassium Form III, at least one, atleast two, at least three, at least four, at least five, or all of thefollowing (a)-(f) apply: (a) polymorphic potassium Form III has a unitcell, as determined by crystal X-ray crystallography, of the followingdimensions: a=8.8412 (3)Å; b=10.8837 (4)Å; c=13.9107 (5)Å; α=71.3620(1)°; β=76.343 (2)°; and γ=82.943 (2)°; (b) potassium Form III has atriclinic crystal system; (c) polymorphic potassium Form III has a P1space group; (d) polymorphic potassium Form III has a volume of 1230.86(8)Å³; (e) polymorphic potassium Form III has a Z value of 2; and (f)potassium Form III has a density of 1.483 Mg/m³.

In some embodiments, polymorphic potassium Form III has the followingproperties:

-   -   1. a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=8.8412 (3)Å; b=10.8837 (4)Å;        c=13.9107 (5)Å; α=71.3620 (1)°; β=76.343 (2)°; and γ=82.943 (2)°

Co-Crystals

Formula 1 Citric Acid Co-Crystal

In another embodiment, a citric acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis disclosed.

In one embodiment, provided is Formula I citric acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Formula I citric acid co-crystal may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=7.4315(6)Å; b=15.5755 (13)Å; c=15.6856 (13)Å; α=88.784 (2)°; 13=77.029 (2)°;and γ=76.832 (2)°.

In some embodiments of Formula I citric acid co-crystal, at least one,at least two, at least three, at least four, at least five, or all ofthe following (a)-(g) apply: (a) Formula I citric acid co-crystal has aunit cell, as determined by crystal X-ray crystallography, of thefollowing dimensions: a=7.4315 (6)Å; b=15.5755 (13)Å; c=15.6856 (13)Å;α=88.784 (2)°; β=77.029 (2)°; and γ=76.832 (2)°; (b) Formula I citricacid co-crystal has a triclinic crystal system; (c) Formula I citricacid co-crystal has a P1 space group; (d) Formula I citric acidco-crystal has a volume of 1721.9(2)Å³; (e) Formula I citric acidco-crystal has a Z value of 2; and (f) Formula I citric acid co-crystalhas a density of 1.608 Mg/m³.

In some embodiments, Formula I citric acid co-crystal has all of thefollowing properties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=7.4315 (6)Å; b=15.5755 (13)Å;        c=15.6856 (13)Å; α=88.784 (2)°; p=77.029 (2)°; and γ=76.832        (2)°.        Formula 1 Fumaric Acid Co-Crystal

In a certain embodiment, a fumaric acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis disclosed.

In one aspect, provided is Formula I fumaric acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Formula I fumaric acid co-crystal may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=26.767(5)Å; b=8.2313 (14)Å; c=24.089 (4) Å; α=90°; p=99.283 (4)°; and γ=90°.

In some embodiments of Formula I fumaric acid co-crystal, at least one,at least two, at least three, at least four, at least five, or all ofthe following (a)-(f) apply: (a) Formula I fumaric acid co-crystal has aunit cell, as determined by crystal X-ray crystallography, of thefollowing dimensions: a=26.767 (5)Å; b=8.2313 (14)Å; c=24.089 (4)Å;α=90°; β=99.283 (4)°; and γ=90°; (b) Formula I fumaric acid co-crystalhas a monoclinic crystal system; (c) Formula I fumaric acid co-crystalhas a C2 space group; (d) Formula I fumaric acid co-crystal has a volumeof 5237.9(16)Å³; (e) Formula I fumaric acid co-crystal has a Z value of8; and (f) Formula I fumaric acid co-crystal has a density of 1.503Mg/m³.

In some embodiments, Formula I fumaric acid co-crystal has all of thefollowing properties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=26.767 (5)Å; b=8.2313 (14)Å;        c=24.089 (4)Å; α=90°; β=99.283 (4)°; and γ=90°.

Formula 1 Oxalic Acid Co-Crystal

In yet another embodiment, a oxalic acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis disclosed.

In one embodiment, provided is Formula I oxalic acid co-crystal of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Formula I oxalic acid co-crystal may have a unit cell as determined bycrystal X-ray crystallography of the following dimensions: a=7.8562(3)Å; b=14.5031 (5)Å; c=19.9756 (7)Å; α=90°; β=101.291 (2)°; and γ=90°.

In some embodiments of Formula I oxalic acid co-crystal, at least one,at least two, at least three, at least four, at least five, or all ofthe following (a)-(f) apply: (a) Formula I oxalic acid co-crystal has aunit cell, as determined by crystal X-ray crystallography, of thefollowing dimensions: a=7.8562 (3)Å; b=14.5031 (5)Å; c=19.9756 (7)Å;α=90°; R=101.291 (2)°; and γ=90°; (b) Formula I oxalic acid co-crystalhas a monoclinic crystal system; (c) Formula I oxalic acid co-crystalhas a P2(1) space group; (d) Formula I oxalic acid co-crystal has avolume of 2231.95(14)Å³; (e) Formula I oxalic acid co-crystal has a Zvalue of 4; and (f) Formula I oxalic acid co-crystal has a density of1.604 g/cm³.

In some embodiments, Formula I oxalic acid co-crystal has the followingproperties:

-   -   (a) a unit cell, as determined by crystal X-ray crystallography,        of the following dimensions a=7.8562 (3)Å; b=14.5031 (5)Å;        c=19.9756 (7)Å; α=90°; β=101.291 (2)°; and γ=90°.

In certain embodiments, Formula I oxalic acid co-crystal has an XRPDpattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 19.1,14.5, and 9.1. In one embodiment, Formula I oxalic acid co-crystal hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at19.1, 14.5, and 9.1 and one or more of the degree 2θ-reflections (+/−0.2degrees 2θ) at 7.6, 26.5, and 17.1. In one embodiment, Formula I oxalicacid co-crystal has an XRPD pattern comprising degree 2θ-reflections(+/−0.2 degrees 2θ) at 19.1, 14.5, and 9.1 and one of the degree2θ-reflections (+/−0.2 degrees 2θ) at 7.6, 26.5, and 17.1. In oneembodiment, Formula I oxalic acid co-crystal has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 19.1, 14.5, and9.1 and two of the degree 2θ-reflections (+/−0.2 degrees 2θ) at 7.6,26.5, and 17.1. In one embodiment, Formula I oxalic acid co-crystal hasan XRPD pattern comprising degree 2θ-reflections (+/−0.2 degrees 2θ) at19.1, 14.5, and 9.1 and three of the degree 2θ-reflections (+/−0.2degrees 2θ) at 7.6, 26.5, and 17.1. In one embodiment, Formula I oxalicacid co-crystal has an XRPD pattern comprising degree 2θ-reflections(+/−0.2 degrees 2θ) at 19.1, 14.5, 9.1, 7.6, 26.5, and 17.1. In oneembodiment, Formula I oxalic acid co-crystal has an XRPD patterncomprising degree 2θ-reflections (+/−0.2 degrees 2θ) at 19.1, 14.5, 9.1,7.6, 26.5, 17.1, 21.8, and 39.4. In one embodiment, polymorphic FormulaI oxalic acid co-crystal has an XRPD pattern comprising any three degree2θ-reflections (+/−0.2 degrees 2θ) selected from the group consisting of19.1, 14.5, 9.1, 7.6, 26.5, 17.1, 21.8, 39.4, 29.7, and 11.6.

Pharmaceutical Compositions

For the purposes of administration, in certain embodiments, thecompounds described herein are administered as a raw chemical or areformulated as pharmaceutical compositions. Pharmaceutical compositionsof the present invention comprise a compound of Formulas (I), (II) or(III), including forms and co-crystals thereof, and a pharmaceuticallyacceptable carrier, diluent or excipient. The compound of Formulas (I),(II), or (III) is present in the composition in an amount which iseffective to treat a particular disease or condition of interest. Theactivity of compounds of Formulas (I), (II), and (III) can be determinedby one skilled in the art, for example, as described in co-pendingapplication U.S. Ser. No. 14/133,855, filed Dec. 19, 2013 entitled“POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS AND THEIR PHARMACEUTICAL USE”.The activity of compounds of Formulas (I), (II), and (III) can also bedetermined by one skilled on the art, for example, as described inco-pending PCT Serial No. US2013/076367, filed Dec. 19, 2013 entitled,“POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS AND THEIR PHARMACEUTICAL USE.”Appropriate concentrations and dosages can be readily determined by oneskilled in the art. In certain embodiments, a compound of Formulas (I),(II), and/or (III) is present in the pharmaceutical composition in anamount from about 25 mg to about 500 mg. In certain embodiments, acompound of Formulas (I), (II), and/or (III) is present in thepharmaceutical composition in an amount of about 100 mg to about 300 mg.In certain embodiments, a compound of Formulas (I), (II), and/or (III)is present in the pharmaceutical composition in an amount of about 5 mgto about 100 mg. In certain embodiments, a compound of Formulas (I),(II), and/or (III) is present in the pharmaceutical composition in anamount of about 25 mg to about 100 mg. In certain embodiments, acompound of Formulas (I), (II), and/or (III) is present in thepharmaceutical composition in an amount of about 50 mg to about 100 mg.In certain embodiments, a compound of Formula (I), (II), and/or (III) ispresent in the pharmaceutical composition in an amount of about 5 mg, 25mg, 50 mg, 75, mg, 100 mg, 200 mg, 300 mg, 400 mg or about 500 mg.

Formula I

Provided are also compositions comprising at least one, at least two, atleast three, at least four, at least five, at least six, at least seven,or all of polymorphs (e.g., any one or more of Formula I polymorphicForms I, II, III, IV, V, VI, VII, and VIII) as described herein. In aparticular embodiment, a composition comprising one of Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII described hereinis provided. In a particular embodiment, a composition comprising two ofFormula I polymorphic Forms I, II, III, IV, V, VI, VII, and VIIIdescribed herein is provided. In a particular embodiment, a compositioncomprising three of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII described herein is provided. In a particular embodiment,a composition comprising four of Formula I polymorphic Forms I, II, III,IV, V, VI, VII, and VIII described herein is provided. In a particularembodiment, a composition comprising five of Formula I polymorphic FormsI, II, III, IV, V, VI, VII, and VIII described herein is provided. In aparticular embodiment, a composition comprising six of Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII described hereinis provided. In a particular embodiment, a composition comprising sevenof Formula I polymorphic Forms I, II, III, IV, V, VI, VII, and VIIIdescribed herein is provided. In a particular embodiment, a compositioncomprising eight of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII described herein is provided. In other embodiments, thecompositions described herein may comprise substantially purepolymorphic forms, or may be substantially free of other polymorphsand/or impurities.

In some embodiments, the composition comprises a polymorphic form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.In certain embodiments are provided compositions comprising apolymorphic form as described herein, wherein the(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewithin the composition is substantially pure (i.e., substantially pureForm I, Form II, Form III, Form IV, Form V, Form VI or Form VII or FormVIII). In particular embodiments of compositions comprising apolymorphic form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,at least about 50%, at least about 60%, at least about 70%, at leastabout 80%, at least about 85%, at least about 90%, at least about 95%,at least about 96%, at least about 97%, at least about 98%, or at leastabout 99% of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidepresent in the composition is one of the polymorphic forms disclosedherein. In certain embodiments, the composition includes at least about50%, at least about 60%, at least about 70%, at least about 80%, atleast about 85%, at least about 90%, at least about 95%, at least about96%, at least about 97%, at least about 98%, or at least about 99% ofone of the polymorphic forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

In other embodiments of compositions comprising a polymorphic formdisclosed herein, less than about 50%, less than about 40%, less thanabout 30%, less than about 20%, less than about 10%, less than about 5%,less than about 4%, less than about 3%, less than about 2% or less thanabout 1% of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidepresent in the composition are other polymorphs of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideand/or impurities.

In yet other embodiments of compositions comprising the polymorphicforms disclosed herein, impurities make up less than about 5%, less thanabout 4%, less than about 3%, less than about 2% or less than about 1%of the total mass relative to the mass of the polymorphic forms present.Impurities may, for example, include by-products from synthesizing (2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1%2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,contaminants, degradation products, other polymorphic forms, amorphousform, water, and solvents. In certain embodiments, impurities includeby-products from the process of synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.In certain embodiments, impurities include contaminants from the processof synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.In certain embodiments, impurities include degradation products of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.In certain embodiments, impurities include other polymorphic forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.In certain embodiments, impurities include water or solvent. In certainembodiments of compositions comprising a polymorphic form disclosedherein, impurities are selected from the group consisting of by-productsfrom synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,contaminants, degradation products, other polymorphic forms, water,solvents and combinations thereof.

In yet other embodiments, the composition comprising a polymorphic formdisclosed herein has less than about 5%, less than about 4%, less thanabout 3%, less than about 2%, or less than about 1% by weight ofamorphous or non-crystalline(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

Formula II

Provided are also compositions comprising at least one polymorph (e.g.,any one or more of Formula II polymorphic Forms I) as described herein.In a particular embodiment, a composition comprising Formula IIpolymorphic Form I, described herein is provided. In other embodiments,the compositions described herein may comprise substantially purepolymorphic forms, or may be substantially free of other polymorphsand/or impurities.

In some embodiments, the composition comprises a polymorphic form ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments are provided compositions comprising apolymorphic form as described herein, wherein the sodium(2R,5S,13aR)-7,9-dioxo-10-(2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatewithin the composition is substantially pure (i.e., substantially pureForm I). In particular embodiments of compositions comprising apolymorphic form of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,at least about 50%, at least about 60%, at least about 70%, at leastabout 80%, at least about 85%, at least about 90%, at least about 95%,at least about 96%, at least about 97%, at least about 98%, or at leastabout 99% of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatepresent in the composition is Formula II, Form I, disclosed herein. Incertain embodiments, the composition includes at least about 50%, atleast about 60%, at least about 70%, at least about 80%, at least about85%, at least about 90%, at least about 95%, at least about 96%, atleast about 97%, at least about 98%, or at least about 99% of Form I ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

In other embodiments of compositions comprising a polymorphic formdisclosed herein, less than about 50%, less than about 40%, less thanabout 30%, less than about 20%, less than about 10%, less than about 5%,less than about 4%, less than about 3%, less than about 2% or less thanabout 1% of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatepresent in the composition are other polymorphs of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateand/or impurities.

In yet other embodiments of compositions comprising the polymorphicforms disclosed herein, impurities make up less than about 5%, less thanabout 4%, less than about 3%, less than about 2% or less than about 1%of the total mass relative to the mass of the polymorphic forms present.Impurities may, for example, include by-products from synthesizingsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,contaminants, degradation products, other polymorphic forms, amorphousform, water, and solvents. In certain embodiments, impurities includeby-products from the process of synthesizing sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include contaminants from the processof synthesizing sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include degradation products ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include other polymorphic forms ofsodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include water or solvent. In certainembodiments of compositions comprising a polymorphic form disclosedherein, impurities are selected from the group consisting of by-productsfrom synthesizing sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,contaminants, degradation products, other polymorphic forms, water,solvents and combinations thereof.

In yet other embodiments, the composition comprising Formula II, Form Idisclosed herein has less than about 5%, less than about 4%, less thanabout 3%, less than about 2%, or less than about 1% by weight ofamorphous or non-crystalline sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

In some embodiments, the term “substantially pure” or “substantiallyfree” with respect to a particular polymorphic form of a compound meansthat the composition comprising the polymorphic form contains less than95%, less than 90%, less than 80%, less than 70%, less than 65%, lessthan 60%, less than 55%, less than 50%, less than 40%, less than 30%,less than 20%, less than 15%, less than 10%, less than 5%, or less than1% by weight of other substances, including other polymorphic formsand/or impurities. In certain embodiments, “substantially pure” or“substantially free of” refers to a substance free of other substances,including other polymorphic forms and/or impurities. Impurities may, forexample, include by-products or left over reagents from chemicalreactions, contaminants, degradation products, other polymorphic forms,water, and solvents.

Formula III

Provided are also compositions comprising at least one, or all ofpolymorphs (e.g., any one or more of Formula III polymorphic Forms I,II, and III) as described herein. In a particular embodiment, acomposition comprising one of Formula III polymorphic Forms I, II, andIII described herein is provided. In a particular embodiment, acomposition comprising two of Formula IIII polymorphic Forms I, II, andIII described herein is provided. In other embodiments, the compositionsdescribed herein may comprise substantially pure polymorphic forms, ormay be substantially free of other polymorphs and/or impurities.

In some embodiments, the composition comprises a polymorphic form ofpotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments are provided compositions comprising apolymorphic form as described herein, wherein the potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatewithin the composition is substantially pure (i.e., substantially pureForm I, II, and/or III). In particular embodiments of compositionscomprising a polymorphic form of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,at least about 50%, at least about 60%, at least about 70%, at leastabout 80%, at least about 85%, at least about 90%, at least about 95%,at least about 96%, at least about 97%, at least about 98%, or at leastabout 99% of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatepresent in the composition is one of the polymorphic forms disclosedherein. In certain embodiments, the composition includes at least about50%, at least about 60%, at least about 70%, at least about 80%, atleast about 85%, at least about 90%, at least about 95%, at least about96%, at least about 97%, at least about 98%, or at least about 99% ofone of the polymorphic forms potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

In other embodiments of compositions comprising a polymorphic formdisclosed herein, less than about 50%, less than about 40%, less thanabout 30%, less than about 20%, less than about 10%, less than about 5%,less than about 4%, less than about 3%, less than about 2% or less thanabout 1% of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatepresent in the composition are other polymorphs of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateand/or impurities.

In yet other embodiments of compositions comprising the polymorphicforms disclosed herein, impurities make up less than about 5%, less thanabout 4%, less than about 3%, less than about 2% or less than about 1%of the total mass relative to the mass of the polymorphic forms present.Impurities may, for example, include by-products from synthesizingpotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,contaminants, degradation products, other polymorphic forms, water, andsolvents. In certain embodiments, impurities include by-products fromthe process of synthesizing potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include contaminants from the processof synthesizing potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include degradation products ofpotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include other polymorphic forms ofpotassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.In certain embodiments, impurities include water or solvent. In certainembodiments of compositions comprising a polymorphic form disclosedherein, impurities are selected from the group consisting of by-productsfrom synthesizing potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,contaminants, degradation products, other polymorphic forms, water,solvents and combinations thereof.

In yet other embodiments, the composition comprising a polymorphic formdisclosed herein has less than about 5%, less than about 4%, less thanabout 3%, less than about 2%, or less than about 1% by weight ofamorphous or non-crystalline potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate.

Provided are also compositions comprising at least one, at least two, atleast three, at least four, at least five, at least six, at least seven,at least eight, at least nine, at least ten, or all of polymorphs (e.g.,any one or more of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, Formula II polymorphic Form I, and/or Formula IIIpolymorphic Forms I, II, and III) as described herein. In a particularembodiment, a composition comprising one of Formula I polymorphic FormsI, II, III, IV, V, VI, VII, and VIII, Formula II polymorphic Form I,and/or Formula III polymorphic Forms I, II, and III described herein isprovided. In a particular embodiment, a composition comprising two ofFormula I polymorphic Forms I, II, III, IV, V, VI, VII, and VIII,Formula II polymorphic Form I, and/or Formula III polymorphic Forms I,II, and III described herein is provided. In a particular embodiment, acomposition comprising three of Formula I polymorphic Forms I, II, III,IV, V, VI, VII, and VIII, Formula II polymorphic Form I, and/or FormulaIII polymorphic Forms I, II, and III described herein is provided. In aparticular embodiment, a composition comprising four of Formul Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII, Formula IIpolymorphic Form I, and/or Formula III polymorphic Forms I, II, and IIIdescribed herein is provided. In a particular embodiment, a compositioncomprising five of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, Formula II polymorphic Form I, and/or Formula IIIpolymorphic Forms I, II, and III described herein is provided. In aparticular embodiment, a composition comprising six of Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII, Formula IIpolymorphic Form I, and/or Formula III polymorphic Forms I, II, and IIIdescribed herein is provided. In a particular embodiment, a compositioncomprising seven of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, Formula II polymorphic Form I, and/or Formula IIIpolymorphic Forms I, II, and III described herein is provided. In aparticular embodiment, a composition comprising eight of Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII, Formula IIpolymorphic Form I, and/or Formula III polymorphic Forms I, II, and IIIdescribed herein is provided. In a particular embodiment, a compositioncomprising nine of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, Formula II polymorphic Form I, and/or Formula IIIpolymorphic Forms I, II, and III described herein is provided. In aparticular embodiment, a composition comprising ten of Formula Ipolymorphic Forms I, II, III, IV, V, VI, VII, and VIII, Formula IIpolymorphic Form I, and/or Formula III polymorphic Forms I, II, and IIIdescribed herein is provided. In a particular embodiment, a compositioncomprising eleven of Formula I polymorphic Forms I, II, III, IV, V, VI,VII, and VIII, Formula II polymorphic Form I, and/or Formula IIIpolymorphic Forms I, II, and III described herein is provided. In otherembodiments, the compositions described herein may comprisesubstantially pure polymorphic forms, or may be substantially free ofother polymorphs and/or impurities.

In some embodiments, the term “substantially pure” or “substantiallyfree” with respect to a particular polymorphic form of a compound meansthat the composition comprising the polymorphic form contains less than95%, less than 90%, less than 80%, less than 70%, less than 65%, lessthan 60%, less than 55%, less than 50%, less than 40%, less than 30%,less than 20%, less than 15%, less than 10%, less than 5%, or less than1% by weight of other substances, including other polymorphic formsand/or impurities. In certain embodiments, “substantially pure” or“substantially free of” refers to a substance free of other substances,including other polymorphic forms and/or impurities. Impurities may, forexample, include by-products or left over reagents from chemicalreactions, contaminants, degradation products, other polymorphic forms,water, and solvents.

Administration of the compounds of the invention in pure form or in anappropriate pharmaceutical composition, can be carried out via any ofthe accepted modes of administration of agents for serving similarutilities. The pharmaceutical compositions of the invention can beprepared by combining a compound of the invention with an appropriatepharmaceutically acceptable carrier, diluent or excipient, and may beformulated into preparations in solid, semi-solid, liquid or gaseousforms, such as tablets, capsules, powders, granules, ointments,solutions, suppositories, injections, inhalants, gels, microspheres, andaerosols. The pharmaceutical compositions of the invention can beprepared by combining a compound of the invention with an appropriatepharmaceutically acceptable carrier, diluent or excipient, and may beformulated into preparations in solid, semi-solid, liquid or gaseousforms, such as solid dispersions and solid solutions. Typical routes ofadministering such pharmaceutical compositions include, withoutlimitation, oral, topical, transdermal, inhalation, parenteral,sublingual, buccal, rectal, vaginal, and intranasal. In one embodiment,the pharmaceutical compositions is prepared for oral administration. Ina specific embodiment, the pharmaceutical composition is a tablet.Pharmaceutical compositions of the invention are formulated so as toallow the active ingredients contained therein to be bioavailable uponadministration of the composition to a patient. Compositions that willbe administered to a subject or patient take the form of one or moredosage units, where for example, a tablet may be a single dosage unit,and a container of a compound of the invention in aerosol form may holda plurality of dosage units. Actual methods of preparing such dosageforms are known, or will be apparent, to those skilled in this art; forexample, see Remington: The Science and Practice of Pharmacy, 20thEdition (Philadelphia College of Pharmacy and Science, 2000). Thecomposition to be administered will, in any event, contain atherapeutically effective amount of a compound of the invention fortreatment of a disease or condition of interest in accordance with theteachings of this invention.

The pharmaceutical compositions of the invention may be prepared bymethodology well known in the pharmaceutical art. For example, apharmaceutical composition intended to be administered by injection canbe prepared by combining a compound of the invention with sterile,distilled water so as to form a solution. A surfactant may be added tofacilitate the formation of a homogeneous solution or suspension.Surfactants are compounds that non-covalently interact with the compoundof the invention so as to facilitate dissolution or homogeneoussuspension of the compound in the aqueous delivery system.

For example, a solid pharmaceutical composition intended for oraladministration can be prepared by mixing a compound of the inventionwith at least one suitable pharmaceutical excipient to form a solidpreformulation composition, which then may be readily subdivided intoequally effective unit dosage forms such as tablets, pills and capsules.Accordingly, in one embodiment, a pharmaceutical composition isprovided, which includes a compound of Formula (I), (II), or (III) and apharmaceutical excipient.

The compounds of the invention are administered in a therapeuticallyeffective amount, which will vary depending upon a variety of factorsincluding the activity of the specific compound employed; the metabolicstability and length of action of the compound; the age, body weight,general health, sex, and diet of the patient; the mode and time ofadministration; the rate of excretion; the drug combination; theseverity of the particular disorder or condition; and the subjectundergoing therapy. In some embodiments, the compounds of the inventioncan be administered alone or in combination with other antiviral agentsonce or twice daily for as long as the patient is infected, latentlyinfected, or to prevent infection (e.g. for multiple years, months,weeks, or days).

Combination Therapy

In one embodiment, a method for treating or preventing an HIV infectionin a human having or at risk of having the infection is provided,comprising administering to the human a therapeutically effective amountof a compound disclosed herein in combination with a therapeuticallyeffective amount of one or more (e.g., one, two, three, one or two, orone to three) additional therapeutic agents. In one embodiment, a methodfor treating an HIV infection in a human having or at risk of having theinfection is provided, comprising administering to the human atherapeutically effective amount of a compound disclosed herein incombination with a therapeutically effective amount of one or more(e.g., one, two, three, one or two, or one to three) additionaltherapeutic agents.

In one embodiment, a method for treating an HIV infection in a humanhaving or at risk of having the infection is provided, comprisingadministering to the human a therapeutically effective amount of acompound or composition disclosed herein in combination with atherapeutically effective amount of one or more (e.g., one, two, three,one or two, or one to three) additional therapeutic agents.

In certain embodiments, the present invention provides a method fortreating an HIV infection, comprising administering to a patient in needthereof a therapeutically effective amount of a compound or compositiondisclosed herein in combination with a therapeutically effective amountof one or more additional therapeutic agents which are suitable fortreating an HIV infection.

One embodiment provides a compound disclosed herein in combination withone or more (e.g., one, two, three, one or two, or one to three)additional therapeutic agents for use in a method for treating orpreventing an HIV infection in a human having or at risk of having theinfection. One embodiment provides a compound disclosed herein incombination with one or more (e.g., one, two, three, one or two, or oneto three) additional therapeutic agents for use in a method for treatingan HIV infection in a human having or at risk of having the infection.One embodiment provides a compound disclosed herein for use in a methodfor treating or preventing an HIV infection in a human having or at riskof having the infection, wherein the compound is administered incombination with one or more (e.g., one, two, three, one or two, or oneto three) additional therapeutic agents. One embodiment provides acompound disclosed herein for use in a method for treating an HIVinfection in a human having or at risk of having the infection, whereinthe compound is administered in combination with one or more (e.g., one,two, three, one or two, or one to three) additional therapeutic agents.In certain embodiments, the present invention provides a compounddisclosed herein in combination with one or more additional therapeuticagents which are suitable for treating an HIV infection, for use in amethod for treating an HIV infection. In certain embodiments, thepresent invention provides a compound disclosed herein for use in amethod for treating an HIV infection, wherein the compound isadministered in combination with one or more additional therapeuticagents which are suitable for treating an HIV infection.

One embodiment provides the use of a compound disclosed herein thereof,in combination with one or more (e.g., one, two, three, one or two, orone to three) additional therapeutic agents in the manufacture of amedicament for treating or preventing an HIV infection in a human havingor at risk of having the infection. One embodiment provides the use of acompound disclosed herein in combination with one or more (e.g., one,two, three, one or two, or one to three) additional therapeutic agentsin the manufacture of a medicament for treating an HIV infection in ahuman having or at risk of having the infection. One embodiment providesthe use of a compound disclosed herein in the manufacture of amedicament for treating or preventing an HIV infection in a human havingor at risk of having the infection, wherein the compound is administeredin combination with one or more (e.g., one, two, three, one or two, orone to three) additional therapeutic agents. One embodiment provides theuse of a compound disclosed herein thereof, in the manufacture of amedicament for treating an HIV infection in a human having or at risk ofhaving the infection, wherein the compound is administered incombination with one or more (e.g., one, two, three, one or two, or oneto three) additional therapeutic agents. In certain embodiments, thepresent invention provides the use of a compound disclosed hereinthereof, in combination with one or more additional therapeutic agentswhich are suitable for treating an HIV infection, in treating an HIVinfection. In certain embodiments, the present invention provides theuse of a compound disclosed herein thereof for treating an HIVinfection, wherein the compound is administered in combination with oneor more additional therapeutic agents which are suitable for treating anHIV infection.

A compound as disclosed herein (e.g., any compound of Formulas (I),(II), and/or (III)) may be combined with one or more additionaltherapeutic agents in any dosage amount of the compound of Formulas (I),(II), and/or (III) (e.g., from 50 mg to 1000 mg of compound).

In one embodiment, pharmaceutical compositions comprising a compounddisclosed herein in combination with one or more (e.g., one, two, three,one or two, or one to three) additional therapeutic agents, and apharmaceutically acceptable carrier, diluent or excipient are provided.

In one embodiment, combination pharmaceutical agents comprising acompound disclosed herein in combination with one or more (e.g., one,two, three, one or two, or one to three) additional therapeutic agentsare provided.

In one embodiment, kits comprising a compound disclosed herein incombination with one or more (e.g., one, two, three, one or two, or oneto three) additional therapeutic agents are provided.

In the above embodiments, the additional therapeutic agent may be ananti-HIV agent. For example, in some embodiments, the additionaltherapeutic agent is selected from the group consisting of HIV proteaseinhibitors, HIV non-nucleoside inhibitors of reverse transcriptase, HIVnucleoside or nucleotide inhibitors of reverse transcriptase, HIVintegrase inhibitors, HIV non-catalytic site (or allosteric) integraseinhibitors, entry inhibitors (e.g., CCR5 inhibitors, gp41 inhibitors(i.e., fusion inhibitors) and CD4 attachment inhibitors), CXCR4inhibitors, gp120 inhibitors, G6PD and NADH-oxidase inhibitors,compounds that target the HIV capsid (“capsid inhibitors”; e.g., capsidpolymerization inhibitors or capsid disrupting compounds such as thosedisclosed in WO 2013/006738 (Gilead Sciences), US 2013/0165489(University of Pennsylvania), and WO 2013/006792 (Pharma Resources),pharmacokinetic enhancers, and other drugs for treating HIV, andcombinations thereof.

In other embodiments, the additional therapeutic agent may be ananti-HIV agent. For example, in some embodiments, the additionaltherapeutic agent is selected from the group consisting of HIV proteaseinhibitors, HIV non-nucleoside or non-nucleotide inhibitors of reversetranscriptase, HIV nucleoside or nucleotide inhibitors of reversetranscriptase, HIV integrase inhibitors, HIV non-catalytic site (orallosteric) integrase inhibitors, HIV entry inhibitors (e.g., CCR5inhibitors, gp41 inhibitors (i.e., fusion inhibitors) and CD4 attachmentinhibitors), CXCR4 inhibitors, gp120 inhibitors, G6PD and NADH-oxidaseinhibitors, HIV vaccines, HIV maturation inhibitors, latency reversingagents (e.g., histone deacetylase inhibitors, proteasome inhibitors,protein kinase C (PKC) activators, and BRD4 inhibitors), compounds thattarget the HIV capsid (“capsid inhibitors”; e.g., capsid polymerizationinhibitors or capsid disrupting compounds, HIV nucleocapsid p7 (NCp7)inhibitors, HIV p24 capsid protein inhibitors), pharmacokineticenhancers, immune-based therapies (e.g., Pd-1 modulators, Pd-L1modulators, toll like receptors modulators IL-15 agonists,), HIVantibodies, bispecific antibodies and “antibody-like” therapeuticproteins (e.g., DARTs®, Duobodies®, Bites®, XmAbs®, TandAbs®, Fabderivatives) including those targeting HIV gp120 or gp41, combinationdrugs for HIV, HIV p17 matrix protein inhibitors, IL-13 antagonists,Peptidyl-prolyl cis-trans isomerase A modulators, Protein disulfideisomerase inhibitors, Complement C5a receptor antagonists, DNAmethyltransferase inhibitor, HIV vif gene modulators, Vif dimerizationantagonists, HIV-1 viral infectivity factor inhibitors, TAT proteininhibitors, HIV-1 Nef modulators, Hck tyrosine kinase modulators, mixedlineage kinase-3 (MLK-3) inhibitors, HIV-1 splicing inhibitors, Revprotein inhibitors, Integrin antagonists, Nucleoprotein inhibitors,Splicing factor modulators, COMM domain containing protein 1 modulators,HIV Ribonuclease H inhibitors, Retrocyclin modulators, CDK-9 inhibitors,Dendritic ICAM-3 grabbing nonintegrin 1 inhibitors, HIV GAG proteininhibitors, HIV POL protein inhibitors, Complement Factor H modulators,Ubiquitin ligase inhibitors, Deoxycytidine kinase inhibitors, Cyclindependent kinase inhibitors Proprotein convertase PC9 stimulators, ATPdependent RNA helicase DDX3X inhibitors, reverse transcriptase primingcomplex inhibitors, HIV gene therapy, PI3K inhibitors, compounds such asthose disclosed in WO 2013/006738 (Gilead Sciences), US 2013/0165489(University of Pennsylvania), WO 2013/091096A1 (Boehringer Ingelheim),WO 2009/062285 (Boehringer Ingelheim), US20140221380 (Japan Tobacco),US20140221378 (Japan Tobacco), WO 2010/130034 (Boehringer Ingelheim), WO2013/159064 (Gilead Sciences), WO 2012/145728 (Gilead Sciences),WO2012/003497 (Gilead Sciences), WO2014/100323 (Gilead Sciences),WO2012/145728 (Gilead Sciences), WO2013/159064 (Gilead Sciences) and WO2012/003498 (Gilead Sciences) and WO 2013/006792 (Pharma Resources), andother drugs for treating HIV, and combinations thereof.

In certain embodiments, the additional therapeutic is selected from thegroup consisting of HIV protease inhibitors, HIV non-nucleoside ornon-nucleotide inhibitors of reverse transcriptase, HIV nucleoside ornucleotide inhibitors of reverse transcriptase, HIV integraseinhibitors, HIV non-catalytic site (or allosteric) integrase inhibitors,pharmacokinetic enhancers, and combinations thereof.

In certain embodiments a compound of Formulas (I), (II), and/or (III) isformulated as a tablet, which may optionally contain one or more othercompounds useful for treating HIV. In certain embodiments, the tabletcan contain another active ingredient for treating HIV, such as HIVprotease inhibitors, HIV non-nucleoside or non-nucleotide inhibitors ofreverse transcriptase, HIV nucleoside or nucleotide inhibitors ofreverse transcriptase, HIV integrase inhibitors, HIV non-catalytic site(or allosteric) integrase inhibitors, pharmacokinetic enhancers, andcombinations thereof. In certain embodiments, the tablet can contain oneor more active ingredients for treating HIV, such as HIV nucleoside ornucleotide inhibitors of reverse transcriptase. In certain embodiments,such tablets are suitable for once daily dosing.

In further embodiments, the additional therapeutic agent is selectedfrom one or more of:

-   -   (1) HIV protease inhibitors selected from the group consisting        of amprenavir, atazanavir, fosamprenavir, indinavir, lopinavir,        ritonavir, nelfinavir, saquinavir, tipranavir, brecanavir,        darunavir, TMC-126, TMC-114, mozenavir (DMP-450), JE-2147        (AG1776), L-756423, RO0334649, KNI-272, DPC-681, DPC-684,        GW640385X, DG17, PPL-100, DG35, and AG 1859;    -   (2) HIV non-nucleoside or non-nucleotide inhibitors of reverse        transcriptase selected from the group consisting of capravirine,        emivirine, delaviridine, efavirenz, nevirapine, (+) calanolide        A, etravirine, GW5634, DPC-083, DPC-961, DPC-963, MIV-150,        TMC-120, rilpivirine, BILR 355 BS, VRX 840773, lersivirine        (UK-453061), RDEA806, KMO23 and MK-1439;    -   (3) HIV nucleoside or nucleotide inhibitors of reverse        transcriptase selected from the group consisting of zidovudine,        emtricitabine, didanosine, stavudine, zalcitabine, lamivudine,        abacavir, abacavir sulfate, amdoxovir, elvucitabine, alovudine,        MIV-210, ±-FTC, D-d4FC, emtricitabine, phosphazide, fozivudine        tidoxil, apricitibine (AVX754), KP-1461, GS-9131 (Gilead        Sciences), fosalvudine tidoxil (formerly HDP 99.0003),        tenofovir, tenofovir disoproxil fumarate, tenofovir alafenamide,        tenofovir alafenamide hemifumarate, tenofovir alafenamide        fumarate (Gilead Sciences), GS-7340 (Gilead Sciences), GS-9148        (Gilead Sciences), adefovir, adefovir dipivoxil, CMX-001        (Chimerix) and CMX-157 (Chimerix);    -   (4) HIV integrase inhibitors selected from the group consisting        of curcumin, derivatives of curcumin, chicoric acid, derivatives        of chicoric acid, 3,5-dicaffeoylquinic acid, derivatives of        3,5-dicaffeoylquinic acid, aurintricarboxylic acid, derivatives        of aurintricarboxylic acid, caffeic acid phenethyl ester,        derivatives of caffeic acid phenethyl ester, tyrphostin,        derivatives of tyrphostin, quercetin, derivatives of quercetin,        S-1360, AR-177, L-870812, and L-870810, raltegravir, BMS-538158,        GSK364735C, BMS-707035, MK-2048, BA 011, elvitegravir,        dolutegravir, dolutegravir sodium, and GSK-744;    -   (6) HIV non-catalytic site, or allosteric, integrase inhibitors        (NCINI) including, but not limited to, BI-224436, CX0516,        CX05045, CX14442, compounds disclosed in WO 2009/062285        (Boehringer Ingelheim), WO 2010/130034 (Boehringer Ingelheim),        WO 2013/159064 (Gilead Sciences), WO 2012/145728 (Gilead        Sciences), WO 2012/003497 (Gilead Sciences), WO 2012/003498        (Gilead Sciences) each of which is incorporated by references in        its entirety herein;    -   (7) gp41 inhibitors selected from the group consisting of        enfuvirtide, sifuvirtide, albuvirtide, FB006M, and TRI-1144;    -   (8) the CXCR4 inhibitor AMD-070;    -   (9) the entry inhibitor SP01A;    -   (10) the gp120 inhibitor BMS-488043;    -   (11) the G6PD and NADH-oxidase inhibitor immunitin;    -   (12) CCR5 inhibitors selected from the group consisting of        aplaviroc, vicriviroc, maraviroc, cenicriviroc, PRO-140,        INCB15050, PF-232798 (Pfizer), and CCR5mAb004;    -   (13) CD4 attachment inhibitors selected from the group        consisting of ibalizumab (TMB-355) and BMS-068 (BMS-663068);    -   (14) pharmacokinetic enhancers selected from the group        consisting of cobicistat and SPI-452; and    -   (15) other drugs for treating HIV selected from the group        consisting of BAS-100, SPI-452, REP 9, SP-01A, TNX-355, DES6,        ODN-93, ODN-112, VGV-1, PA-457 (bevirimat), HRG214, VGX-410,        KD-247, AMZ 0026, CYT 99007A-221 HIV, DEBIO-025, BAY 50-4798,        MDX010 (ipilimumab), PBS 119, ALG 889, and PA-1050040 (PA-040),        and combinations thereof.

In certain embodiments, the additional therapeutic agent is selectedfrom one or more of:

(1) Combination drugs selected from the group consisting of ATRIPLA®(efavirenz+tenofovir disoproxil fumarate+emtricitabine), COMPLERA® orEVIPLERA® (rilpivirine+tenofovir disoproxil fumarate+emtricitabine),STRIBILD® (elvitegravir+cobicistat+tenofovir disoproxilfumarate+emtricitabine), dolutegravir+abacavir sulfate+lamivudine,TRIUMEQ® (dolutegravir+abacavir+lamivudine),lamivudine+nevirapine+zidovudine, dolutegravir+rilpivirine,dolutegravir+rilpivirine hydrochloride, atazanavir sulfate+cobicistat,atazanavir+cobicistat, darunavir+cobicistat,efavirenz+lamivudine+tenofovir disoproxil fumarate, tenofoviralafenamide hemifumarate+emtricitabine+cobicistat+elvitegravir,tenofovir alafenamide hemifumarate+emtricitabine, tenofoviralafenamide+emtricitabine, tenofovir alafenamidehemifumarate+emtricitabine+rilpivirine, tenofoviralafenamide+emtricitabine+rilpivirine, Vacc-4x+romidepsin,darunavir+tenofovir alafenamide hemifumarate+emtricitabine+cobicistat,APH-0812, raltegravir+lamivudine, KALETRA® (ALUVIA®,lopinavir+ritonavir), atazanavir sulfate+ritonavir, COMBIVIR®(zidovudine+lamivudine, AZT+3TC), EPZICOM® (Kivexa®, abacavirsulfate+lamivudine, ABC+3TC), TRIZIVIR® (abacavirsulfate+zidovudine+lamivudine, ABC+AZT+3TC), TRUVADA® (tenofovirdisoproxil fumarate+emtricitabine, TDF+FTC),doravirine+lamivudine+tenofovir disoproxil fumarate,doravirine+lamivudine+tenofovir disoproxil, tenofovir+lamivudine andlamivudine+tenofovir disoproxil fumarate;

(2) HIV protease inhibitors selected from the group consisting ofamprenavir, atazanavir, fosamprenavir, fosamprenavir calcium, indinavir,indinavir sulfate, lopinavir, ritonavir, nelfinavir, nelfinavirmesylate, saquinavir, saquinavir mesylate, tipranavir, brecanavir,darunavir, DG-17, TMB-657 (PPL-100) and TMC-310911;

(3) HIV non-nucleoside or non-nucleotide inhibitors of reversetranscriptase selected from the group consisting of delavirdine,delavirdine mesylate, nevirapine, etravirine, dapivirine, doravirine,rilpivirine, efavirenz, KM-023, VM-1500, lentinan and AIC-292;

(4) HIV nucleoside or nucleotide inhibitors of reverse transcriptaseselected from the group consisting of VIDEX® and VIDEX® EC (didanosine,ddl), zidovudine, emtricitabine, didanosine, stavudine, zalcitabine,lamivudine, censavudine, abacavir, abacavir sulfate, amdoxovir,elvucitabine, alovudine, phosphazid, fozivudine tidoxil, apricitabine,amdoxovir, KP-1461, fosalvudine tidoxil, tenofovir, tenofovirdisoproxil, tenofovir disoproxil fumarate, tenofovir disoproxilhemifumarate, tenofovir alafenamide, tenofovir alafenamide hemifumarate,tenofovir alafenamide fumarate, adefovir, adefovir dipivoxil, andfestinavir;

(5) HIV integrase inhibitors selected from the group consisting ofcurcumin, derivatives of curcumin, chicoric acid, derivatives ofchicoric acid, 3,5-dicaffeoylquinic acid, derivatives of3,5-dicaffeoylquinic acid, aurintricarboxylic acid, derivatives ofaurintricarboxylic acid, caffeic acid phenethyl ester, derivatives ofcaffeic acid phenethyl ester, tyrphostin, derivatives of tyrphostin,quercetin, derivatives of quercetin, raltegravir, elvitegravir,dolutegravir and cabotegravir;

(6) HIV non-catalytic site, or allosteric, integrase inhibitors (NCINI)selected from the group consisting of CX-05168, CX-05045 and CX-14442;

(7) HIV gp41 inhibitors selected from the group consisting ofenfuvirtide, sifuvirtide and albuvirtide;

(8) HIV entry inhibitors selected from the group consisting ofcenicriviroc;

(9) HIV gp120 inhibitors selected from the group consisting of Radha-108(Receptol) and BMS-663068;

(10) CCR5 inhibitors selected from the group consisting of aplaviroc,vicriviroc, maraviroc, cenicriviroc, PRO-140, Adaptavir (RAP-101),nifeviroc (TD-0232), TD-0680, and vMIP (Haimipu);

(11) CD4 attachment inhibitors selected from the group consisting ofibalizumab;

(12) CXCR4 inhibitors selected from the group consisting of plerixafor,ALT-1188, vMIP and Haimipu;

(13) Pharmacokinetic enhancers selected from the group consisting ofcobicistat and ritonavir;

(14) Immune-based therapies selected from the group consisting ofdermaVir, interleukin-7, plaquenil (hydroxychloroquine), proleukin(aldesleukin, IL-2), interferon alfa, interferon alfa-2b, interferonalfa-n3, pegylated interferon alfa, interferon gamma, hydroxyurea,mycophenolate mofetil (MPA) and its ester derivative mycophenolatemofetil (MMF), WF-10, ribavirin, IL-2, IL-12, polymer polyethyleneimine(PEI), Gepon, VGV-1, MOR-22, BMS-936559, toll-like receptors modulators(tlr1, tlr2, tlr3, tlr4, tlr5, tlr6, tlr7, tlr8, tlr9, tlr10, tlr11,tlr12 and tlr13), rintatolimod and IR-103;

(15) HIV vaccines selected from the group consisting of peptidevaccines, recombinant subunit protein vaccines, live vector vaccines,DNA vaccines, virus-like particle vaccines (pseudovirion vaccine),CD4-derived peptide vaccines, vaccine combinations, rgp 120 (AIDSVAX),ALVAC HIV (vCP1521)/AIDSVAX B/E (gp120) (RV144), monomeric gp120 HIV-1subtype C vaccine (Novartis), Remune, ITV-1, Contre Vir, Ad5-ENVA-48,DCVax-001 (CDX-2401), PEP-6409, Vacc-4x, Vacc-05, VAC-3S, multiclade DNArecombinant adenovirus-5 (rAd5), Pennvax-G, VRC-HIV MAB060-00-AB,AVX-101, Tat Oyi vaccine, AVX-201, HIV-LAMP-vax, Ad35, Ad35-GRIN,NAcGM3/VSSP ISA-51, poly-ICLC adjuvanted vaccines, TatImmune,GTU-multiHlV (FIT-06), AGS-004, gp140[delta]V2.TV1+MF-59, rVSVIN HIV-1gag vaccine, SeV-Gag vaccine, AT-20, DNK-4, Ad35-GRIN/ENV, TBC-M4,HIVAX, HIVAX-2, NYVAC-HIV-PT1, NYVAC-HIV-PT4, DNA-HIV-PT123,rAAV1-PG9DP, GOVX-Bll, GOVX-B21, ThV-01, TUTI-16, VGX-3300, TVI-HIV-1,Ad-4 (Ad4-env Clade C+Ad4-mGag), EN41-UGR7C, EN41-FPA2, PreVaxTat,TL-01, SAV-001, AE-H, MYM-V101, CombiHIVvac, ADVAX, MYM-V201, MVA-CMDR,ETV-01, CDX-1401, rcAd26.MOS1.HIV-Env and DNA-Ad5 gag/pol/nef/nev(HVTN505);

(16) HIV antibodies, bispecific antibodies and “antibody-like”therapeutic proteins (such as DARTs®, Duobodies®, Bites®, XmAbs®,TandAbs®, Fab derivatives) including BMS-936559, TMB-360 and thosetargeting HIV gp120 or gp41 selected from the group consisting ofbavituximab, UB-421, C2F5, C2G12, C4E10, C2F5+C2G12+C4E10, 3-BNC-117,PGT145, PGT121, MDX010 (ipilimumab), VRC01, A32, 7B2, 10E8, VRC-07-523and VRC07;

(17) latency reversing agents selected from the group consisting ofHistone deacetylase inhibitors such as Romidepsin, vorinostat,panobinostat; Proteasome inhibitors such as Velcade; protein kinase C(PKC) activators such as Indolactam, Prostratin, Ingenol B andDAG-lactones, Ionomycin, GSK-343, PMA, SAHA, BRD4 inhibitors, IL-15,JQ1, disulfram, and amphotericin B;

(18) HIV nucleocapsid p7 (NCp7) inhibitors selected from the groupconsisting of azodicarbonamide;

(19) HIV maturation inhibitors selected from the group consisting ofBMS-955176 and GSK-2838232;

(20) PI3K inhibitors selected from the group consisting of idelalisib,AZD-8186, buparlisib, CLR-457, pictilisib, neratinib, rigosertib,rigosertib sodium, EN-3342, TGR-1202, alpelisib, duvelisib, UCB-5857,taselisib, XL-765, gedatolisib, VS-5584, copanlisib, CAI orotate,perifosine, RG-7666, GSK-2636771, DS-7423, panulisib, GSK-2269557,GSK-2126458, CUDC-907, PQR-309, INCB-040093, pilaralisib, BAY-1082439,puquitinib mesylate, SAR-245409, AMG-319, RP-6530, ZSTK-474, MLN-1117,SF-1126, RV-1729, sonolisib, LY-3023414, SAR-260301 and CLR-1401;

(21) the compounds disclosed in WO 2004/096286 (Gilead Sciences), WO2006/110157 (Gilead Sciences), WO 2006/015261 (Gilead Sciences), WO2013/006738 (Gilead Sciences), US 2013/0165489 (University ofPennsylvania), US20140221380 (Japan Tobacco), US20140221378 (JapanTobacco), WO 2013/006792 (Pharma Resources), WO 2009/062285 (BoehringerIngelheim), WO 2010/130034 (Boehringer Ingelheim), WO 2013/091096A1(Boehringer Ingelheim), WO 2013/159064 (Gilead Sciences), WO 2012/145728(Gilead Sciences), WO2012/003497 (Gilead Sciences), WO2014/100323(Gilead Sciences), WO2012/145728 (Gilead Sciences), WO2013/159064(Gilead Sciences) and WO 2012/003498 (Gilead Sciences); and (22) otherdrugs for treating HIV selected from the group consisting of BanLec,MK-8507, AG-1105, TR-452, MK-8591, REP 9, CYT-107, alisporivir, NOV-205,IND-02, metenkefalin, PGN-007, Acemannan, Gamimune, Prolastin,1,5-dicaffeoylquinic acid, BIT-225, RPI-MN, VSSP, Hlviral, IMO-3100,SB-728-T, RPI-MN, VIR-576, HGTV-43, MK-1376, rHIV7-shl-TAR-CCR5RZ, MazFgene therapy, BlockAide, ABX-464, SCY-635, naltrexone, AAV-eCD4-Ig genetherapy and PA-1050040 (PA-040);

and combinations thereof.

In certain embodiments, a compound disclosed herein is combined withtwo, three, four or more additional therapeutic agents. In certainembodiments, a compound disclosed herein is combined with two additionaltherapeutic agents. In other embodiments, a compound disclosed herein iscombined with three additional therapeutic agents. In furtherembodiments, a compound disclosed herein is combined with fouradditional therapeutic agents. The two, three four or more additionaltherapeutic agents can be different therapeutic agents selected from thesame class of therapeutic agents, or they can be selected from differentclasses of therapeutic agents. In a specific embodiment, a compounddisclosed herein is combined with an HIV nucleoside or nucleotideinhibitor of reverse transcriptase and an HIV non-nucleoside inhibitorof reverse transcriptase. In another specific embodiment, a compounddisclosed herein is combined with an HIV nucleoside or nucleotideinhibitor of reverse transcriptase, and an HIV protease inhibitingcompound. In a further embodiment, a compound disclosed herein iscombined with an HIV nucleoside or nucleotide inhibitor of reversetranscriptase, an HIV non-nucleoside inhibitor of reverse transcriptase,and an HIV protease inhibiting compound. In an additional embodiment, acompound disclosed herein is combined with an HIV nucleoside ornucleotide inhibitor of reverse transcriptase, an HIV non-nucleosideinhibitor of reverse transcriptase, and a pharmacokinetic enhancer. Inanother embodiment, a compound disclosed herein is combined with two HIVnucleoside or nucleotide inhibitors of reverse transcriptase.

In certain embodiments, a compound disclosed herein, is combined withone, two, three, four or more additional therapeutic agents. In certainembodiments, a compound disclosed herein is combined with one additionaltherapeutic agent. In certain embodiments, a compound disclosed hereinis combined with two additional therapeutic agents. In otherembodiments, a compound disclosed herein is combined with threeadditional therapeutic agents. In further embodiments, a compounddisclosed herein is combined with four additional therapeutic agents.The one, two, three, four or more additional therapeutic agents can bedifferent therapeutic agents selected from the same class of therapeuticagents, and/or they can be selected from different classes oftherapeutic agents. In a specific embodiment, a compound disclosedherein is combined with an HIV nucleoside or nucleotide inhibitor ofreverse transcriptase and an HIV non-nucleoside inhibitor of reversetranscriptase. In another specific embodiment, a compound disclosedherein is combined with an HIV nucleoside or nucleotide inhibitor ofreverse transcriptase, and an HIV protease inhibiting compound. In afurther embodiment, a compound disclosed herein is combined with an HIVnucleoside or nucleotide inhibitor of reverse transcriptase, an HIVnon-nucleoside inhibitor of reverse transcriptase, and an HIV proteaseinhibiting compound. In an additional embodiment, a compound disclosedherein is combined with an HIV nucleoside or nucleotide inhibitor ofreverse transcriptase, an HIV non-nucleoside inhibitor of reversetranscriptase, and a pharmacokinetic enhancer. In certain embodiments, acompound disclosed herein is combined with at least one HIV nucleosideinhibitor of reverse transcriptase, an integrase inhibitor, and apharmacokinetic enhancer. In another embodiment, a compound disclosedherein is combined with two HIV nucleoside or nucleotide inhibitors ofreverse transcriptase.

In certain embodiments, a compound disclosed herein is combined with atleast one HIV nucleoside inhibitor of reverse transcriptase, anintegrase inhibitor, and a pharmacokinetic enhancer.

In a particular embodiment, a compound disclosed herein is combined withabacavir, abacavir sulfate, tenofovir, tenofovir disoproxil fumarate,tenofovir alafenamide, or tenofovir alafenamide hemifumarate.

In a particular embodiment, a compound disclosed herein is combined withtenofovir, tenofovir disoproxil fumarate, tenofovir alafenamide, ortenofovir alafenamide hemifumarate.

In a particular embodiment, a compound disclosed herein is combined witha first additional therapeutic agent selected from the group consistingof: abacavir, abacavir sulfate, tenofovir, tenofovir disoproxilfumarate, tenofovir alafenamide, and tenofovir alafenamide hemifumarateand a second additional therapeutic agent selected from the groupconsisting of emtricitibine and lamivudine.

In a particular embodiment, a compound disclosed herein is combined witha first additional therapeutic agent selected from the group consistingof: tenofovir, tenofovir disoproxil fumarate, tenofovir alafenamide, andtenofovir alafenamide hemifumarate and a second additional therapeuticagent, wherein the second additional therapeutic agent is emtricitibine.

In a particular embodiment, a compound disclosed herein is combined withone, two, three, four or more additional therapeutic agents selectedfrom Triumeq® (dolutegravir+abacavir+lamivudine), dolutegravir+abacavirsulfate+lamivudine, raltegravir, raltegravir+lamivudine, Truvada®(tenofovir disoproxil fumarate+emtricitabine, TDF+FTC), maraviroc,enfuvirtide, Epzicom® (Livexa®, abacavir sulfate+lamivudine, ABC+3TC),Trizivir® (abacavir sulfate+zidovudine+lamivudine, ABC+AZT+3TC),adefovir, adefovir dipivoxil, Stribild®(elvitegravir+cobicistat+tenofovir disoproxil fumarate+emtricitabine),rilpivirine, rilpivirine hydrochloride, Complera® (Eviplera®,rilpivirine+tenofovir disoproxil fumarate+emtricitabine), Cobicistat,atazanavir sulfate+cobicistat, atazanavir+cobicistat,darunavir+cobicistat, Atripla® (efavirenz+tenofovir disoproxilfumarate+emtricitabine), atazanavir, atazanavir_(—) sulfate,dolutegravir, elvitegravir, Aluvia® (Kaletra®, lopinavir+ritonavir),ritonavir, emtricitabine, atazanavir sulfate+ritonavir, darunavir,lamivudine, Prolastin, fosamprenavir, fosamprenavir calcium, efavirenz,Combivir® (zidovudine+lamivudine, AZT+3TC), etravirine, nelfinavir,nelfinavir mesylate, interferon, didanosine, stavudine, indinavir,indinavir sulfate, tenofovir+lamivudine, zidovudine, nevirapine,saquinavir, saquinavir mesylate, aldesleukin, zalcitabine, tipranavir,amprenavir, delavirdine, delavirdine mesylate, Radha-108 (Receptol),Hlviral, lamivudine+tenofovir disoproxil fumarate,efavirenz+lamivudine+tenofovir disoproxil fumarate, phosphazid,lamivudine+nevirapine+zidovudine, abacavir, abacavir sulfate, tenofovir,tenofovir disoproxil, tenofovir disoproxil fumarate,darunavir+cobicistat, atazanavir sulfate+cobicistat,atazanavir+cobicistat, tenofovir alafenamide and tenofovir alafenamidehemifumarate.

In a particular embodiment, a compound disclosed herein is combined withabacavir, abacavir sulfate, tenofovir, tenofovir disoproxil, tenofovirdisoproxil fumarate, tenofovir disoproxil hemifumarate, tenofoviralafenamide or tenofovir alafenamide hemifumarate.

In a particular embodiment, a compound disclosed herein is combined withtenofovir, tenofovir disoproxil, tenofovir disoproxil fumarate,tenofovir alafenamide, or tenofovir alafenamide hemifumarate.

In a particular embodiment, a compound disclosed herein is combined witha first additional therapeutic agent selected from the group consistingof: abacavir sulfate, tenofovir, tenofovir disoproxil, tenofovirdisoproxil fumarate, tenofovir alafenamide, and tenofovir alafenamidehemifumarate and a second additional therapeutic agent selected from thegroup consisting of emtricitabine and lamivudine.

In a particular embodiment, a compound disclosed herein is combined witha first additional therapeutic agent selected from the group consistingof: tenofovir, tenofovir disoproxil, tenofovir disoproxil fumarate,tenofovir alafenamide, and tenofovir alafenamide hemifumarate and asecond additional therapeutic agent, wherein the second additionaltherapeutic agent is emtricitabine.

In certain embodiments, a compound disclosed herein is combined with5-30 mg tenofovir alafenamide fumarate, tenofovir alafenamidehemifumarate, or tenofovir alafenamide and 200 mg emtricitabine. Incertain embodiments, a compound disclosed herein is combined with 5-10;5-15; 5-20; 5-25; 25-30; 20-30; 15-30; or 10-30 mg tenofovir alafenamidefumarate, tenofovir alafenamide hemifumarate, or tenofovir alafenamideand 200 mg emtricitabine. In certain embodiments, a compound disclosedherein is combined with 10 mg tenofovir alafenamide fumarate, tenofoviralafenamide hemifumarate, or tenofovir alafenamide and 200 mgemtricitabine. In certain embodiments, a compound disclosed herein iscombined with 25 mg tenofovir alafenamide fumarate, tenofoviralafenamide hemifumarate, or tenofovir alafenamide and 200 mgemtricitabine. A compound as disclosed herein (e.g., a compound ofFormulas (I), (II), and/or (III)) may be combined with the agentsprovided herein in any dosage amount of the compound (e.g., from 50 mgto 500 mg of compound) the same as if each combination of dosages werespecifically and individually listed.

In certain embodiments, a compound disclosed herein is combined with200-400 mg tenofovir disproxil, tenofovir disoproxil fumarate, ortenofovir disoproxil hemifumarate and 200 mg emtricitabine. In certainembodiments, a compound disclosed herein is combined with 200-250;200-300; 200-350; 250-350; 250-400; 350-400; 300-400; or 250-400 mgtenofovir disoproxil, tenofovir disoproxil fumarate, or tenofovirdisoproxil hemifumarate and 200 mg emtricitabine. In certainembodiments, a compound disclosed herein is combined with 300 mgtenofovir disoproxil fumarate, tenofovir disoproxil hemifumarate, ortenofovir disoproxil and 200 mg emtricitabine. A compound as disclosedherein (e.g., a compound of Formulas (I), (II), and/or (III)) may becombined with the agents provided herein in any dosage amount of thecompound (e.g., from 50 mg to 500 mg of compound) the same as if eachcombination of dosages were specifically and individually listed.

In certain embodiments, when a compound disclosed herein is combinedwith one or more additional therapeutic agents as described above, thecomponents of the composition are administered as a simultaneous orsequential regimen. When administered sequentially, the combination maybe administered in two or more administrations.

In certain embodiments, a compound disclosed herein is combined with oneor more additional therapeutic agents in a unitary dosage form forsimultaneous administration to a patient, for example as a solid dosageform for oral administration.

In certain embodiments, a compound disclosed herein is administered withone or more additional therapeutic agents. Co-administration of acompound disclosed herein with one or more additional therapeutic agentsgenerally refers to simultaneous or sequential administration of acompound disclosed herein and one or more additional therapeutic agents,such that therapeutically effective amounts of the compound disclosedherein and one or more additional therapeutic agents are both present inthe body of the patient.

Co-administration includes administration of unit dosages of thecompounds disclosed herein before or after administration of unitdosages of one or more additional therapeutic agents, for example,administration of the compound disclosed herein within seconds, minutes,or hours of the administration of one or more additional therapeuticagents. For example, in some embodiments, a unit dose of a compounddisclosed herein is administered first, followed within seconds orminutes by administration of a unit dose of one or more additionaltherapeutic agents. Alternatively, in other embodiments, a unit dose ofone or more additional therapeutic agents is administered first,followed by administration of a unit dose of a compound disclosed hereinwithin seconds or minutes. In some embodiments, a unit dose of acompound disclosed herein is administered first, followed, after aperiod of hours (e.g., 1-12 hours), by administration of a unit dose ofone or more additional therapeutic agents. In other embodiments, a unitdose of one or more additional therapeutic agents is administered first,followed, after a period of hours (e.g., 1-12 hours), by administrationof a unit dose of a compound disclosed herein.

XRPD Data

In certain embodiments, the crystalline forms are characterized by theinterlattice plane intervals determined by an X-ray powder diffractionpattern (XRPD). The diffractogram of XRPD is typically represented by adiagram plotting the intensity of the peaks versus the location of thepeaks, i.e., diffraction angle 2θ (two-theta) in degrees. Theintensities are often given in parenthesis with the followingabbreviations: very strong=vst; strong=st; medium=m; weak=w; and veryweak=vw. The characteristic peaks of a given XRPD can be selectedaccording to the peak locations and their relative intensity toconveniently distinguish this crystalline structure from others.

Those skilled in the art recognize that the measurements of the XRPDpeak locations and/or intensity for a given crystalline form of the samecompound will vary within a margin of error. The values of degree 2θallow appropriate error margins. Typically, the error margins arerepresented by “±”. For example, the degree 2θ of about “8.7±0.3”denotes a range from about 8.7+0.3, i.e., about 9.0, to about 8.7−0.3,i.e., about 8.4. Depending on the sample preparation techniques, thecalibration techniques applied to the instruments, human operationalvariation, and etc, those skilled in the art recognize that theappropriate error of margins for a XRPD can be ±0.5; ±0.4; ±0.3; ±0.2;±0.1; ±0.05; or less. In certain embodiments of the invention, the XRPDmargin of error is ±0.2.

Additional details of the methods and equipment used for the XRPDanalysis are described in the Examples section.

The XRPD peaks for the crystalline forms of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(Formula I) Form I is below in Table 1A.

TABLE 1A XRPD peaks for crystalline forms of Formula I Form I Formula IForm I Peak Relative Position Intensity [°2θ] [%] 9.3 6.4 10.5 43.7 11.412.6 13.1 96.7 13.9 33.0 16.2 79.4 17.4 48.0 20.6 93.1 22.3 42.0 25.081.5 27.4 100.0

The XRPD peaks for the crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(Formula I) Form II is below in Table 1B.

TABLE 1B XRPD peaks for crystalline forms of Formula I Form II Formula IForm II Peak Relative Position Intensity [°2θ] [%] 6.6 100.0 10.6 59.312.5 30.6 14.3 14.9 16.2 19.3 21.4 65.1 23.5 10.6 25.6 11.9

The XRPD peaks for the crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(Formula I) Form III is below in Table 1C.

TABLE 1C XRPD peaks for crystalline forms of Formula I Form III FormulaI Form III Peak Relative Position Intensity [°2θ] [%] 9.6 56.7 12.1 19.114.0 26.2 16.2 17.6 18.5 74.6 20.0 100.0 22.5 35.4 25.0 19.2 27.0 18.029.0 14.0

The XRPD peaks for the crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(Formula I) Form IV is below in Table 1D.

TABLE 1D XRPD peaks for crystalline forms of Formula I Form IV Formula IForm IV Peak Relative Position Intensity [°2θ] [%] 6.2 96.1 8.6 40.013.2 22.0 16.3 100.0 18.7 32.7 20.0 33.1 22.3 72.9 22.7 76.2 25.8 44.127.7 30.3

The XRPD peaks for the crystalline form of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate(Formula II) is below in Table 1E.

TABLE 1E XRPD peaks for crystalline forms of Formula II Form I FormulaII Form I Peak Relative Position Intensity [°2θ] [%] 5.5 100.0 16.1 87.317.9 22.4 19.5 38.0 22.1 61.8 22.5 42.2 23.3 60.4 26.6 27.3 28.5 42.9

The XRPD peaks for the crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideoxalic acid co-crystal Form I is below in Table 1F.

TABLE 1F XRPD peaks for crystalline forms of Formula I Oxalic AcidCo-crystal Form I Formula I Oxalic Acid Co-crystal Form I Peak RelativePosition Intensity [°2θ] [%] 7.6 16.5 9.1 39.4 11.6 13.6 14.5 94.8 17.151.1 19.1 100.0 21.8 40.7 26.5 54.8 29.7 30.4 39.4 37.1Preparation of the Polymorphs

Formula I

One method of synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[l′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(e.g. a compound of Formula (I)) has been previously described in PCTPublication No. WO2014/100323. This reference is hereby incorporatedherein by reference in its entirety, and specifically with respect tothe synthesis of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.

For example, in one aspect, provided is a method of producing acomposition comprising one or more polymorphs of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining a compound of Formula (I) with asuitable solvent or a mixture of suitable solvents to produce acomposition comprising one or more polymorphs of the compound of Formula(I). In another aspect, provided is another method of producing acomposition comprising one or more polymorphs of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a suitable solvent or a mixture of suitable solvents.

The choice of a particular solvent or combination of solvents affectsthe formation favoring one polymorphic form of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideover another. Solvents suitable for polymorph formation may include, forexample, methanol, ethanol, water, isopropyl acetate, acetonitrile,tetrahydrofuran, methyl isobutyl ketone, and any mixtures thereof.

In another aspect, provided is also one or more polymorphs of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced according to any of the methods described herein.

It should be understood that the methods for preparing the polymorphsdescribed herein (including any one or more of polymorphic Forms I toVIII) may yield quantity and quality differences compared to the methodsfor preparing(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced on laboratory scale.

Formula I, Forms I and II

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form I, Form II, or a mixture thereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent to produce a composition comprising polymorphic Form I,Form II, or a mixture thereof, of the(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is isopropyl acetate.

Provided is a polymorphic Form I, Form II, or a mixture thereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent, wherein the solvent is isopropyl acetate.

Formula I, Form III

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form III of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent to produce a composition comprising polymorphic Form IIIof the(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is methyl isobutyl ketone.

Provided is a polymorphic Form III of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent, wherein the solvent is methyl isobutyl ketone.

Formula I, Forms IV, VII, and VIII

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form IV, Form VII, and Form VIII, or a mixturethereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent to produce a composition comprising polymorphic Form IV,Form VII, and Form VIII, or a mixture thereof, of the(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is methanol.

Provided is a polymorphic Form IV, Form VII, and Form VIII, or a mixturethereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent, wherein the solvent is methanol.

Formula I, Form V

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form V of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent to produce a composition comprising polymorphic Form V ofthe(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is water.

Provided is a polymorphic Form V of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent, wherein the solvent is water.

Formula I, Form VI

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form VI of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[I′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a solvent to produce a composition comprising polymorphic Form VIof the(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is selected from the group consisting of methanol,water, and any mixtures thereof. In an embodiment, the solvent is amixture of water and methanol.

Provided is a polymorphic Form VI of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide with a solvent, wherein the solvent is selected from the groupconsisting of methanol, water, and any mixtures thereof. In anembodiment, the solvent is a mixture of water and methanol.

Formula II

One method of synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(e.g. a compound of Formula (I)) has been previously described in PCTPublication No. WO2014/100323. This reference is hereby incorporatedherein by reference in its entirety, and specifically with respect tothe synthesis of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.One method of synthesizing sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate(e.g. a compound of Formula (II)) is described herein.

For example, in one aspect, provided is a method of producing acomposition comprising one or more polymorphs of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining a compound of Formula (II) with asuitable solvent or a mixture of suitable solvents to produce acomposition comprising one or more polymorphs of the compound of Formula(II). In another aspect, provided is another method of producing acomposition comprising one or more polymorphs of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatewith a suitable solvent or a mixture of suitable solvents.

The choice of a particular solvent or combination of solvents affectsthe formation favoring one polymorphic form of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateover another. Solvents suitable for polymorph formation may include, forexample, methanol, ethanol, water, isopropyl acetate, acetonitrile,tetrahydrofuran, methyl isobutyl ketone, and any mixtures thereof.

In another aspect, provided is also one or more polymorphs of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateproduced according to any of the methods described herein.

It should be understood that the methods for preparing the polymorphsdescribed herein (including any polymorphic Form I) may yield quantityand quality differences compared to the methods for preparing sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateproduced on laboratory scale.

Formula II, Form I

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a sodium base (e.g. sodium hydroxide) in a solvent to produce acomposition comprising polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the solvent is selected from the group consisting of ethanol,dimethylformamide, and any mixture thereof. In an embodiment, thesolvent is a mixture of ethanol and dimethylformamide.

Provided is also polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprepared by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a sodium base (e.g. sodium hydroxide) in a solvent, wherein thesolvent is selected from the group consisting of ethanol,dimethylformamide, and any mixture thereof. In an embodiment, thesolvent is a mixture of ethanol and dimethylformamide.

Formula III

One method of synthesizing(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(e.g. a compound of Formula (I)) has been previously described in PCTPublication No. WO2014/100323. This reference is hereby incorporatedherein by reference in its entirety, and specifically with respect tothe synthesis of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide.One method of synthesizing potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate(e.g. a compound of Formula (III)) is described herein.

For example, in one aspect, provided is a method of producing acomposition comprising one or more polymorphs of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining a compound of Formula (III) witha suitable solvent or a mixture of suitable solvents to produce acomposition comprising one or more polymorphs of the compound of Formula(III). In another aspect, provided is another method of producing acomposition comprising one or more polymorphs of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olatewith a suitable solvent or a mixture of suitable solvents.

The choice of a particular solvent or combination of solvents affectsthe formation favoring one polymorphic form of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateover another. Solvents suitable for polymorph formation may include, forexample, methanol, ethanol, water, isopropyl acetate, acetonitrile,tetrahydrofuran, methyl isobutyl ketone, and any mixtures thereof.

In another aspect, provided is also one or more polymorphs of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateproduced according to any of the methods described herein.

It should be understood that the methods for preparing the polymorphsdescribed herein (including any one or more of polymorphic Forms I-III)may yield quantity and quality differences compared to the methods forpreparing potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateproduced on laboratory scale.

Formula III, Form I

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form I of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining (2R,5 S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium acetate) in a solvent to produce acomposition comprising polymorphic Form I of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the solvent is selected from the group consisting of ethanol,water, and any mixtures thereof. In an embodiment, the solvent is amixture of ethanol and water.

Provided is also polymorphic Form I of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprepared by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium acetate) in a solvent, wherein thesolvent is selected from the group consisting of ethanol, water, and anymixtures thereof.

Formula III, Form II

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form II of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium acetate) in a solvent to produce acomposition comprising polymorphic Form II of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the solvent is selected from the group consisting ofacetonitrile, water, and any mixtures thereof. In an embodiment, thesolvent is a mixture of acetonitrile and water.

Provided is also polymorphic Form II of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprepared by combining (2R,5 S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1%2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium acetate) in a solvent, wherein thesolvent is selected from the group consisting of acetonitrile, water,and any mixtures thereof.

Formula III, Form III

In one embodiment, provided is a method of producing a compositioncomprising polymorphic Form III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium phosphate) in a solvent to producea composition comprising polymorphic Form III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate,wherein the solvent is methanol.

Provided is also polymorphic Form III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateprepared by combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith a potassium base (e.g. potassium phosphate) in a solvent, whereinthe solvent is methanol.

Formula I Co-Crystals

In one embodiment, provided is a method of producing a compositioncomprising polymorphic citric acid co-crystal, fumaric acid co-crystal,oxalic acid co-crystal, or a mixture thereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the method comprises combining(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith an acid (e.g. citric acid, fumaric acid, or oxalic acid) in asolvent to produce a composition comprising polymorphic citric acidco-crystal, fumaric acid co-crystal, oxalic acid co-crystal, or amixture thereof, of the(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the solvent is tetrahydrofuran.

Provided is a polymorphic citric acid co-crystal, fumaric acidco-crystal, oxalic acid co-crystal, or a mixture thereof, of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideproduced by combining (2R,5 S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamidewith an acid (e.g. citric acid, fumaric acid, or oxalic acid) in asolvent, wherein the solvent is tetrahydrofuran.

Uses in Manufacturing of Drug Product

Formula I

Provided are also a use of the polymorphs described herein in themanufacture of a drug product. The one or more of the polymorphic formsdescribed herein (e.g., one or more of polymorphic Forms I, II, III, IV,V, VI, VII, and VIII) may be used as an intermediate in themanufacturing process to produce the drug product.

In certain embodiments, Forms I to VIII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideare used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form I of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form II of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form III of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form IV of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form V of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form VI of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form VII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form VIII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideisused in the manufacture of an active pharmaceutical ingredient.

Formula II

Provided are also a use of the polymorphs described herein in themanufacture of a drug product. The one or more of the polymorphic formsdescribed herein (e.g., polymorphic Form I) may be used as anintermediate in the manufacturing process to produce the drug product.

In certain embodiments, Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateare used in the manufacture of an active pharmaceutical ingredient.

Formula III

Provided are also a use of the polymorphs described herein in themanufacture of a drug product. The one or more of the polymorphic formsdescribed herein (e.g., one or more of polymorphic Forms I, II, and III)may be used as an intermediate in the manufacturing process to producethe drug product.

In certain embodiments, Forms I-III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateare used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form I of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form II of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateis used in the manufacture of an active pharmaceutical ingredient. Incertain embodiments, Form III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateis used in the manufacture of an active pharmaceutical ingredient.

Articles of Manufacture and Kits

Compositions comprising one or more of the polymorphic forms describedherein (e.g., one or more of polymorphic Forms I to VIII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide;polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate;and polymorphic Forms I, II, and III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate)and formulated in one or more pharmaceutically acceptable carriers,excipients or other ingredients can be prepared, placed in anappropriate container, and labeled for treatment of an indicatedcondition. Accordingly, there also is contemplated an article ofmanufacture, such as a container comprising a dosage form of one or moreof the polymorphic forms described herein (e.g., one or more ofpolymorphic Forms I to VIII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[l′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide;polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate;and polymorphic Forms I, II, and III of potassium (2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate),and a label containing instructions for use of the compound(s).

In some embodiments, the article of manufacture is a containercomprising a dosage form of one or more of the polymorphic formsdescribed herein (e.g., one or more of polymorphic Forms I to VIII of(2R,5S,13aR)-8-Hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide;polymorphic Form I of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate;and polymorphic Forms I, II, and III of potassium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olate),and one or more pharmaceutically acceptable carriers, excipients orother ingredients. In one embodiment of the articles of manufacturedescribed herein, the dosage form is a tablet.

Kits also are contemplated. For example, a kit can comprise a dosageform of a pharmaceutical composition and a package insert containinginstructions for use of the composition in treatment of a medicalcondition. The instructions for use in the kit may be for treating HIV.In certain embodiments, the instructions for use in the kit may be fortreating HIV.

In certain embodiments, the polymorphic, salt, co-crystal and solvateforms described herein may potentially exhibit improved properties. Forexample, in certain embodiments, the polymorphic, salt, co-crystal andsolvate forms described herein may potentially exhibit improvedstability. Such improved stability could have a potentially beneficialimpact on the manufacture of the Compound of Formulas I, II, and/or III,such as for example offering the ability to store process intermediatefor extended periods of time. Improved stability could also potentiallybenefit a composition or pharmaceutical composition of the Compound ofFormulas I, II, and/or III. In certain embodiments, the polymorphic,salt and solvate forms described herein may also potentially result inimproved yield of the Compound of Formulas I, II, and/or III, orpotentially result in an improvement of the quality of the Compound ofFormulas I, II, and/or III. In certain embodiments, the polymorphic,salt and solvate forms described herein may also exhibit improvedpharmacokinetic properties and/or potentially improved bioavailability.

Methods

Formula I Form I

(2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(73 mg) was added to a glass vial. Isopropanol (1 mL) was added, thevial was capped, and the suspension was stirred at about 21° C. for notless than 5 days. Formula I Form I was isolated as a solid from thesuspension by centrifuge/filtration and characterized as discussedbelow.

Formula I Form II

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(60 mg) was added to a glass vial. Methyl tert-butyl ether (1 mL) wasadded, the vial was capped, and the suspension was stirred at about 21°C. for not less than 5 days. Formula I Form II was isolated as a solidfrom the suspension by centrifuge/filtration and characterized asdiscussed below.

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(98 mg) was suspended in ethanol/water (1 mL, aw 0.7-0.8) for 5 dayswith agitation. Formula I Form II was isolated as a solid from thesuspension by centrifuge/filtration and characterized as discussedbelow.

Formula I Form III from Compound G-1a

A solution of about 10% (w/w) Compound G-1a (2.5 g Compound 1001) inmethylene chloride was concentrated to a residue under vacuum. LiCl (2.6g, 7 equiv) followed by N-methyl-2-pyrrolidone (12.5 mL) was added tothe resulting residue. The method of preparing compound G1-a can bedetermined by one skilled on the art, for example, as described inco-pending PCT Serial No. US2013/076367, filed Dec. 19, 2013 entitled,“POLYCYCLIC-CARBAMOYLPYRIDONE COMPOUNDS AND THEIR PHARMACEUTICAL USE.”The mixture was heated to an internal temperature of approximately 75°C. After 2.5 hours, the reaction was cooled to approximately 20° C.Dichloromethane (12.5 mL) and 0.5M hydrochloric acid (12.5 mL) wasadded, and the resulting mixture stirred for 5 minutes. The phases wereseparated, and the organic layer was washed with 10% aqueous sodiumchloride solution (twice) followed by water. This solution wasconcentrated while gradually adding 3 volumes of isopropyl alcoholportionwise (40° C. bath temperature, 200-230 torr vacuum). Theresulting slurry was slowly cooled to 2-4° C. The product was filteredand deliquored and dried. Formula I Form III was isolated andcharacterized as discussed below.

Formula I Form III from Formula I

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(100 mg) and ethanol (0.5 mL) were added to a reaction vessel and seededwith Formula I Form III. The slurry was allowed to age at roomtemperature for about 18 hours. Formula I Form III was isolated as asolid from the suspension by centrifuge/filtration and characterized asdiscussed below.

Formula I Form IV

(2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(406 mg) and potassium acetate (200 mg) were added to a glass vial.Methanol (5 mL) was added, the vial was capped, and the suspension wasstirred at about 21° C. After 11 days the solids were isolated from thesuspension by centrifuge/filtration and the filtrate retained. Afterslow evaporation over 16 days, large crystals of Formula I Form IV werefound in the filtrate vessel.

Formula I Form V

25.2 mg(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) was mixed with 1.21 grams of water at room temperature,forming a solution. After several days, crystals suitable for singlecrystal X-ray crystallography were found and analyzed.

Formula I Form VI

173 mg of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) was suspended in 2 mL of methanol/water solution (a_(w) 0.5).The suspension was filtered the next day and several days after that,crystals suitable for single crystal X-ray crystallography were found inthe filtrate and analyzed.

Formula I Form VII

112.3 mg(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) suspended in 0.95 grams of methanol at room temperature. Asample of the suspension was filtered for testing after several days,and several days post-filtration, solids suitable for single crystalX-ray crystallography were found in the filtrate and analyzed.

Formula I Form VIII

5.3 g(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) suspended in 80 mL of methanol at room temperature. To themixture was slowly added 0.70 grams of KOH dissolved in 20 mL methanol.Full addition of KOH solution resulted in a solution. A suspensionformed over the course of two days and a sample was filtered for testingafter ten days. After several days, solids suitable for single crystalX-ray crystallography were found in the filtrate and analyzed.

Formula II Form I

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(20 g) and ethanol (80 mL) were added to a reaction vessel and warmed toabout 75° C. Aqueous sodium hydroxide (22 mL 2 M solution) was addedover approximately 30 minutes, after which the slurry was cooled toapproximately 20° C. over approximately one hour. Sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I was collected by filtration, washed with EtOH (50 mL) and driedunder vacuum.

1H NMR (400 MHz, DMSO-d6) δ 10.63 (t, J=5.8 Hz, 1H), 7.88 (s, 1H),7.29-7.07 (m, 2H), 5.20 (dd, J=8.6, 3.6 Hz, 1H), 5.09 (t, J=4.1 Hz, 1H),4.52 (m, 3H), 4.35 (dd, J=12.8, 3.6 Hz, 1H), 3.87 (dd, J=12.7, 8.7 Hz,1H), 2.03-1.80 (m, 3H), 1.76-1.64 (m, 2H), 1.50-1.40 (m, 1H).

Formula I Citric Acid Co-Crystal Form I

(2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(131 mg) and citric acid (148 mg) were added to a glass vial.Tetrahydrofuran (1 mL) was added, the vial was capped, and the mixturewas stirred at about 21° C. for two days. The vial was vented and thesolvent was allowed to evaporate at about 21° C. unassisted. After eightweeks at room temperature, crystals were found in the vessel and wereidentified as a 1:2 Formula I citric acid co-crystal.

Formula I Fumaric Acid Co-crystal Form I

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2″:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(131 mg) and fumaric acid (103 mg) were added to a glass vial.Tetrahydrofuran (1 mL) was added, the vial capped, and the suspensionstirred at about 21° C. for two days. An additional 1 mL oftetrahydrofuran was added, and the mixture was heated to 45° C. Afterabout 12 hours at 45° C. the mixture was found to be fully dissolved andwas removed from the heat bath. The vial was vented, and the solventleft to evaporate at room temperature. After one day solids wereobserved in the vial and it was re-capped. After eight weeks largecrystals were found in the capped vial and identified as a 1:1 Formula Ifumaric acid co-crystal.

Formula I Oxalic Acid Co-crystal Form I

(2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(147 mg) and oxalic acid (134 mg) were added to a glass vial.Tetrahydrofuran (1 mL) was added, the vial capped, and the resultingsolution was stirred at about 21° C. for about two days. The vessel wasvented, and the solvent was allowed to evaporate at room temperatureunassisted. After one day solids were observed in the vial and it wasre-capped. Two days later large crystals were found in the vial and wereidentified as a 1:1 Formula I oxalic acid co-crystal.

Formula III Form I

406 mg of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) was combined with 200 mg potassium acetate and 5 mL ofmethanol at room temperature, resulting in a suspension. A sample of thesuspension was filtered the next day for testing. After several days,solids suitable for single crystal X-ray crystallography were found inthe filtrate and analyzed.

(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(1.96 g) was charged to a reaction flask and stirred, followed byethanol (20 mL). The mixture was stirred at room temperature resultingin a suspension. In a separate vessel potassium hydroxide (253 mg) wasdissolved in deionized water (5 mL). The potassium hydroxide solutionwas transferred by syringe pump to the stirring suspension over about2.5 hours followed by a rinse into the reactor with water (2 mL) afterthe base solution transfer was completed.

A sample of about 0.5 mL of the resulting suspension wascentrifuge/filtered. The filtrate was retained and stored at roomtemperature. After several weeks it had evaporated and the vesselcontained large crystals, which were identified by single x-raycrystallography as Formula III Form II.

Formula III Form II (Dimer)

94.8 mg of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide(25.2 mg) was suspended in 1 mL of acetonitrile/water (1:1). After oneweek a sample was filtered for testing. After several days, solidssuitable for single crystal X-ray crystallography were found in thefiltrate and analyzed.

Formula III Form III

A 4 mL glass vial was charged with 140 mg of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,and 73 mg of potassium phosphate and 2 mL of methanol. The vial wascapped and placed in a rotating mixer to provide gentle and constantmixing. The experiment was carried out at room temperature. More than aweek later and more than a month later solids were isolated bycentrifuge/filtration and examined by XRPD. Large crystals suitable forSingle Crystal X-ray Crystallography were found and analyzed.

The crystalline forms of the present invention were characterized byvarious analytical techniques, including X-ray powder diffraction(XRPD), differential scanning calorimetry (DSC), thermogravimetricanalysis (TGA), and dynamic vapor sorption (DVS) using the proceduresdescribed below.

X-Ray Powder Diffraction: XRPD analysis was conducted on adiffractometer (PANanalytical XPERT-PRO, PANanalytical B.V., Almelo,Netherlands) using copper radiation (Cu Kα, λ=1.5418 Å). Samples wereprepared for analysis by depositing the powdered sample in the center ofan aluminum holder equipped with a zero background plate. The generatorwas operated at a voltage of 45 kV and amperage of 40 mA. Slits usedwere Soller 0.02 rad., antiscatter 1.0°, and divergence. The samplerotation speed was 2 sec. Scans were performed from 2 to 40° 2θ during15 min with a step size of 0.0167° 2θ. Data analysis was performed byX'Pert Highscore version 2.2c (PANalytical B.V., Almelo, Netherlands)and X'Pert data viewer version 1.2d (PANalytical B.V., Almelo,Netherlands).

The XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I is represented in FIG. 1.

The XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm II is represented in FIG. 2.

The XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III is represented in FIG. 3.

The XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm IV is represented in FIG. 4.

The XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is represented in FIG. 5. The calculated XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I represented in FIG. 5 was calculated by using Mercury 3.1Development (Build RC5). Single crystal data for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I was input into Mercury 3.1 Development (Build RC5) to calculatethe XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I. Bulk material, such as stoichiometry arity between thetemperature was obtained on a Rigaku Miniflex II XRD using powersettings of 40 kV, 15 mA, scan speed of 2.0000 degrees per minute, aMiniflex 300/600 goniometer and an ASC-6 attachment, a scan range of3.000 to 40.000 degrees, an incident slit of 1.250 degrees, a lengthlimiting slit of 10.0 mm, and SC-70 detector, a receiving slit #1 of1.250 degrees, continuous scan mode, and a receiving slit #2 of 0.3 mm.The sample was prepared by smoothing about 20 mg of solids on a silicondisk mounted in a metal holder. Acquisition temperature was ˜21° C.

The XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is further represented in FIG. 16. The calculated XRPD patternfor sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I represented in FIG. 16 was calculated by using Mercury 3.1Development (Build RC5). Single crystal data for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I was input into Mercury 3.1 Development (Build RC5) to calculatethe XRPD pattern for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I. Bulk material, such as stoichiometry arity between thetemperature was obtained on a Rigaku Miniflex II XRD using powersettings of 40 kV, 15 mA, scan speed of 2.0000 degrees per minute, aMiniflex 300/600 goniometer and an ASC-6 attachment, a scan range of3.000 to 40.000 degrees, an incident slit of 1.250 degrees, a lengthlimiting slit of 10.0 mm, and SC-70 detector, a receiving slit #1 of1.250 degrees, continuous scan mode, and a receiving slit #2 of 0.3 mm.The sample was prepared by smoothing about 20 mg of solids on a silicondisk mounted in a metal holder. Acquisition temperature was ˜21° C.

FIG. 16 compares the calculated XRPD pattern of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I to the experimental XRPD pattern of sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I. The comparison shows the degree to which the calculated XRPD andexperimental XRPD agree. Strong agreement indicates the solved crystalstructure is also the crystal structure of the material analyzeddirectly by XRPD. This determination can support orthogonal data aboutthe composition of the bulk material, such as stoichiometry.

The actual and calculated XRPD pattern for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideoxalic acid co-crystal Form I is represented in FIG. 6.

Differential scanning calorimetry: Thermal properties were evaluatedusing a Differential Scanning calorimetry (DSC) instrument (TA Q1000, TAInstruments, New Castle, Del., USA). Approximately 1 to 10 mg of solidsample was placed in a standard aluminum pan vented with a pinhole foreach experiment and heated at a rate of 5 to 10° C./min under a 50mL/min nitrogen purge. Data analysis was conducted using UniversalAnalysis 2000 Version 4.7A (TA Instruments, New Castle, Del., USA). Heatof fusion analysis was conducted by sigmoidal integration of theendothermic melting peak.

The DSC for (2R,5 S,13 aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I is represented in FIG. 7.

The DSC for (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III is represented in FIG. 8.

The DSC for sodium(2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is represented in FIG. 9.

Thermogravimetric analysis: Thermogravimetric analysis (TGA) wasperformed on a TGA instrument (TA Q500, TA Instruments, New Castle,Del., USA). Approximately 1 to 10 mg of solid sample was placed in anopen aluminum pan for each experiment and heated at a rate of 5 to 10°C./min under a 60 mL/min nitrogen purge using. Data analysis wasconducted using Universal Analysis 2000 Version 4.7A (TA Instruments,New Castle, Del., USA).

The TGA for (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I is represented in FIG. 10.

The TGA for(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III is represented in FIG. 11.

The TGA for sodium (2R,5 S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is represented in FIG. 12.

Dynamic vapor sorption: The hygroscopicity was evaluated at roomtemperature using a dynamic vapor sorption (DVS) instrument (TGA Q5000TA Instruments, New Castle, Del.). Water adsorption and desorption werestudied as a function of relative humidity (RH) over the range of 0 to90% at 25° C. The relative humidity in the chamber was increased by 10%RH and held until the so lid and atmosphere reached equilibration. Theequilibrium test was continued until passed or expired after 5 or 10hours. At this point, RH was raised 10% higher and the process wasrepeated until 90% RH was reached and equilibrated. During this period,the water sorption was monitored. For desorption, the relative humiditywas decreased in a similar manner to measure a full sorption/desorptioncycle. The cycle was optionally repeated. All experiments were operatedin dm/dt mode (mass variation over time) to determine the equilibrationendpoint. Approximately 5-10 mg of solid was used. Data analysis wasconducted using Universal Analysis 2000 Version 4.7A (TA Instruments,New Castle, Del., USA).

The DVS for (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm I is represented in FIG. 13.

The DVS for (2R,5 S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamideForm III is represented in FIG. 14.

The DVS for sodium (2R,5 S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl)carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepin-8-olateForm I is represented in FIG. 15.

The single crystal X-ray diffraction studies were carried out on aBruker APEX II Ultra diffractometer equipped with Mo K_(α) radiation(e.g. Wavelength). Crystals of the subject compound were cut into a0.22×0.18×0.04 mm section and mounted on a Cryoloop with Paratone-N oil.Data were collected in a nitrogen gas stream at a particular temperatureas shown in the Tables below (e.g. 100(2) K or 200(2) K). A total numberof reflections were collected covering the indices, (e.g. −9<=h<=10,−13<=k<=16, −37<=l<=36). Certain reflections were found to be symmetryindependent, with a R_(int) value. Indexing and unit-cell refinementindicated a crystal system (e.g. monoclinic, triclinic, or orthorhombiclattice). The space group, which was uniquely defined by the systematicabsences in the data, was found (e.g. P1, P2(1), C2, and P21212). Thedata were integrated using the Bruker SAINT software program and scaledusing the SADABS software program. Solution by direct methods (SHELXT)produced a complete phasing model compatible with the proposedstructure.

All nonhydrogen atoms were refined anisotropically by full-matrixleast-squares (SHELXL-2014). All hydrogen atoms were placed using ariding model. Their positions were constrained relative to their parentatom using the appropriate HFIX command in SHELXL-2014. Crystallographicdata are summarized in tables below. The absolute stereochemistry wasset to conform to previously studied samples of the same compound.

The single crystal X-ray crystallography data for Formula I Forms I-IVare summarized in Table 2A below. The single crystal X-raycrystallography data for Formula I Forms V-VIII are summarized in Table2A-I below. The indexing data for Formula II Form I is summarized inTable 2C below. The single crystal X-ray crystallography data for theco-crystals of the present invention summarized in Table 2C below. Thesingle crystal X-ray crystallography data for Formula III Forms I-III issummarized in Table 2D-I below. Data from further characterization ofthe crystals are summarized in Tables 3A and 3B below. Data from furthercharacterization of the crystals are also summarized in Tables 3A-I and3C-I below.

TABLE 2A Single Crystal Data for Formula I Forms I-IV and Formula IIForm I Unit Cell Dimensions Form and Solvent Density Distance (Å) Angle(°) Identification Solvent in lattice (g/cm³) a b c α β γ Formula I IPAcnone 1.609 11.4498 (4)  8.4767 (3) 19.9163 (8) 90 106.286 (2) 90 Form IFormula I IPAc 0.125 1.537 8.5226 (7) 26.934 (2)  8.6861 (8) 90 101.862(2) 90 Form II mole water Formula I MIBK none 1.537 18.002 (2) 10.9517(12)  20.687 (2) 90 107.770 (4) 90 Form III Formula I methanol 0.671.484 29.948 (2) 16.5172 (9)  13.2051 (8) 90 108.972 (4) 90 Form IV molewater

TABLE 2A-I Single Crystal Data for Formula I Forms V-VIII Unit CellDimensions Form and Solvent Distance (Å) Angle (°) IdentificationSolvent in lattice Density (g/cm³) a b c α β γ Formula I water 0.5 1.5738.4993 (6) 8.7290 (8) 13.8619 (13) 99.278 (5) 101.427 (4)  100.494 (4)Form V mole water Formula I methanol/water 0.5 1.545 19.5163 (5)  6.4593(2) 16.6066 (5)  90 103.5680 (13)  90 Form VI mole water 0.5 molemethanol Formula I methanol 1.08 1.468  30.785 (12) 16.685 (6)  25.956(10) 90 108.189 (10) 90 Form VII mole water Formula I methanol None1.560 10.3242 (18) 10.7826 (17) 17.848 (3)  90 105.578 (8)  90 Form VIII

TABLE 2B Indexing Data for Formula II Form I Unit Cell Dimensions Formand Distance (Å) Angle (°) Identification Solvent a b c α β γ Formula IImethanol 9.105 13.986 31.384 90 90 90 Form I

The single crystal X-ray crystallography data for Formula II Form I issummarized in Table 2B-I below.

TABLE 2B-I Single Crystal Data for Formula II, Form I C42 H34 F6 N6Acquisition Space Z Unit Cell Dimensions Na2 O10 Temp. Group 100(2) KP212121 4 Distance (Å) Angle (°) Form and Solvent Solvent in Density a bc α β γ Identification lattice (Mg/m³) Formula II Ethanol/DMF none 1.6148.9561 (10) 13.9202 (14) 31.115 (3) 90 90 90 Form I

TABLE 2C Single Crystal Data for Formula I Co-Crystals Solvent Unit CellDimensions Form and Ratio in lattice Density Distace (Å) Angle (°)Identification Formula I:coformer Solvent (ratio) (Mg/m³) a b c α β γFormula I 1:2 THF None 1.608 7.4315 (6) 15.5755 (13) 15.6856 (13) 88.784(2) 77.029 (2) 76.832 (2) Citric Acid co-crystal Formula I 1:1 THF THF1.503 26.767 (5)  8.2313 (14) 24.089 (4) 90 99.283 (4) 90 Fumaric acid(0.375 co-crystal mole) Formula I 1:1 THF None 1.604 7.8562 (3) 14.5031(5)  19.9756 (7)  90 101.291 (2)  90 Oxalic Acid co-crystal

TABLE 2D-1 Single Crystal Data for Formula III, Forms I-III Unit CellDimensions Form and Density Distance (Å) Angle (°) IdentificationSolvent (Mg/m³) a b c α β γ Formula III Ethanol/water 1.498 32.0409 (11)10.2935 (4) 15.4691 (7) 90 90 90 Form I Formula III Acetonitrile/water1.336 32.0285 (17) 10.3029 (7)  15.5363 (10) 90 90 90 Form II FormulaIII Methanol 1.483  8.8412 (3)  10.8837 (4) 13.9107 (5) 71.3620 (10)76.343 (2) 82.943 (2) Form III

TABLE 3A Crystal Data and Structure Refinement for Formula I Forms I-IVFormula I Formula I Formula I Formula I Property Form I Form II Form IIIForm IV Empirical formula C₂₁H₂₀F₃N₃O_(5.5) C_(21.5)H₂₀F₃N₃O₆C₂₁H₁₈F₁₃N₁₃O_(6.08) C₂₁H₁₈F₃N₃O₅ Formula weight 459.40 473.40 466.72449.38 Temperature 100(2) K 200(2) K 100(2) K 100(2) K Wavelength0.71073 Å 1.54178 Å 0.71073 Å 0.71073 Å Crystal system TriclinicMonoclinic Monoclinic Monoclinic Space group P2(1) P2(1) P2(1) C 2Volume 970.18(14) Å³ 2035.03(10) Å³ 12666(8) Å³ 1913.9(6) Å³ Z 2 4 24 4Density 1.573 Mg/m³ 1.545 Mg/m³ 1.468 Mg/m³ 1.560 Mg/m³ (calculated)

TABLE 3A-I Crystal Data and Structure Refinement for Formula I FormsV-VIII Formula I Formula I Formula I Formula I Property Form V Form VIForm VII Form VIII Empirical formula C₂₁H₂₀F₃N₃O_(5.5) C_(21.5)H₂₀F₃N₃O₆C₂₁H₁₈F₁₃N₁₃O_(6.08) C₂₁H₁₈F₃N₃O₅ Formula weight 459.40 473.40 466.72449.38 Temperature 100(2) K 200(2) K 100(2) K 100(2) K Wavelength0.71073 Å 1.54178 Å 0.71073 Å 0.71073 Å Crystal system TriclinicMonoclinic Monoclinic Monoclinic Space group P2(1) P2(1) P2(1) C 2Volume 970.18(14) Å³ 2035.03(10) Å³ 12666(8) Å³ 1913.9(6) Å³ Z 2 4 24 4Density 1.573 Mg/m³ 1.545 Mg/m³ 1.468 Mg/m³ 1.560 Mg/m³ (calculated)

TABLE 3B Crystal Data and Structure Refinement for Formula I Co-CrystalsFormula I Formula I Formula I Fumaric Acid co- Oxalic Acid co- PropertyCitric Acid co-crystal crystal crystal Empirical formula C₃₃H₃₄F₃N₃O₁₉C_(26.50)H₂₅F₃N₃O_(9.38) C₂₃H₂₀F₃N₃O₉ Formula weight 833.63 592.49539.42 Temperature 100(2) K 100(2) K 150(2) K Wavelength 0.71073 Å0.71073 Å 0.71073 Å Crystal system Triclinic Monoclinic Monoclinic Spacegroup P1 C2 P2(1) Volume 1721.9(2) Å³ 5237.9(16) Å³ 2231.95(14) Å³ Z 2 84 Density (calculated) 1.608 Mg/m³ 1.503 Mg/m³ 1.604 g/cm³

TABLE 3C-I Crystal Data and Structure Refinement for Formula III Form I,Formula III Form II (Dimer), and Formula III, Form III Formula IIIFormula III Formula III Property Form I Form II Form III Empiricalformula C₂₁H₁₇F₃KN₃O_(10.5) C₄₂H₃₄F₆K₂N₆O_(13.50) C₂₃H₂₃F₃KN₃O₇ Formulaweight 575.47 1030.95 549.54 Temperature 100(2) K 100(2) K 100(2) KWavelength 0.71073 Å 0.71073 Å 0.71073 Å Crystal system OrthorhombicOrthorhombic Triclinic Space group P 21 21 2 P 21 21 2 P 1 Volume5101.9(4) Å³ 5126.8(6) Å³ 1230.86 (8) Å³ Z 8 4 2 Density (calculated)1.498 Mg/m³ 1.336 Mg/m³ 1.483 Mg/m³

In certain embodiments of the invention, Formula III is hydrated. Incertain embodiments, Formula III is hydrated with five to six watermolecules.

Each of the references including all patents, patent applications andpublications cited in the present application is incorporated herein byreference in its entirety, as if each of them is individuallyincorporated. Further, it would be appreciated that, in the aboveteaching of invention, the skilled in the art could make certain changesor modifications to the invention, and these equivalents would still bewithin the scope of the invention defined by the appended claims of theapplication. Each of the references including all patents, patentapplications and publications cited in the present application isincorporated herein by reference in its entirety, as if each of them isindividually incorporated. Further, it would be appreciated that, in theabove teaching of invention, the skilled in the art could make certainchanges or modifications to the invention, and these equivalents wouldstill be within the scope of the invention defined by the appendedclaims of the application.

What is claimed:
 1. A crystalline form of(2R,5S,13aR)-8-hydroxy-7,9-dioxo-N-(2,4,6-trifluorobenzyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide,wherein the crystalline form is Form I.
 2. The crystalline form of claim1, characterized by an x-ray powder diffraction (XRPD) pattern havingpeaks at about 13.1°, 16.2°, and 20.6° 2-θ±0.2° 2-θ.
 3. The crystallineform of claim 2, wherein the x-ray powder diffraction (XRPD) pattern hasfurther peaks at about 25.0° and 27.4° 2-θ±0.2° 2-θ.
 4. The crystallineform of claim 3, wherein the x-ray powder diffraction (XRPD) pattern hasfurther peaks at about 9.3° and 10.5° 2-θ±0.2° 2-θ.
 5. The crystallineform of claim 4, wherein the x-ray powder diffraction (XRPD) pattern hasfurther peaks at about 11.4°, 13.9°, 17.4°, and 22.3° 2-θ±0.2° 2-θ. 6.The crystalline form of claim 1, characterized by an x-ray powderdiffraction (XRPD) pattern substantially as set forth in FIG.
 1. 7. Thecrystalline form of claim 1, characterized by differential scanningcalorimetry (DSC) pattern substantially as set forth in FIG.
 7. 8. Thecrystalline form of claim 1, characterized by a dynamic vapor sorption(DVS) pattern substantially as set forth in FIG.
 13. 9. A pharmaceuticalcomposition comprising a therapeutically effective amount of a compoundof claim 1 and a pharmaceutically acceptable carrier or excipient. 10.The pharmaceutical composition of claim 9, further comprising one tothree additional therapeutic agents.
 11. The pharmaceutical compositionof claim 10, wherein the additional therapeutic agents are each anti-HIVdrugs.
 12. The pharmaceutical composition of claim 10, wherein theadditional therapeutic agents are each independently selected from thegroup consisting of HIV protease inhibitors, HIV non-nucleosideinhibitors of reverse transcriptase, HIV nucleoside inhibitors ofreverse transcriptase, HIV nucleotide inhibitors of reversetranscriptase, pharmacokinetic enhancers and other drugs for treatingHIV.
 13. The pharmaceutical composition of claim 12, wherein at leasttwo of the additional therapeutic agents are each HIV nucleotide ornucleoside inhibitors of reverse transcriptase.
 14. The pharmaceuticalcomposition of claim 9, further comprising tenofovir disoproxil fumarateand emtricitabine.
 15. The pharmaceutical composition of claim 9,further comprising tenofovir alafenamide and emtricitabine.
 16. Thepharmaceutical composition of claim 9, further comprising tenofoviralafenamide hemifumarate and emtricitabine.
 17. The pharmaceuticalcomposition of claim 9, wherein the pharmaceutical composition is in aunit dosage form.
 18. The pharmaceutical composition of claim 17,wherein the unit dosage form is a tablet.
 19. A pharmaceuticalcomposition prepared by combining a therapeutically effective amount ofa compound of claim 1 with a pharmaceutically acceptable carrier orexcipient.
 20. The pharmaceutical composition of claim 9, furthercomprising tenofovir alafenamide fumarate and emtricitabine.